Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Shareholders' Equity

v2.4.1.9
Consolidated Statements of Shareholders' Equity (USD $)
In Thousands, unless otherwise specified
Total
Shares of Beneficial Interest at Par Value [Member]
Additional Paid in Capital [Member]
Distributions in Excess of Net Income Attributable to the Controlling Interests [Member]
Total Shareholders' Equity [Member]
Noncontrolling Interests in Subsidiaries [Member]
Balance at Dec. 31, 2014 $ 822,229us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest $ 678us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 1,184,395us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (365,518)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 819,555us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
$ 2,674us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Balance (in shares) at Dec. 31, 2014   67,819us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Net income attributable to the controlling interests 29,506us-gaap_NetIncomeLoss     29,506us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
29,506us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
 
Net Income (Loss) Attributable to Noncontrolling Interest (108)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest         (108)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Dividends (20,519)us-gaap_Dividends     (20,519)us-gaap_Dividends
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
(20,519)us-gaap_Dividends
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
 
Stock Issued During Period, Shares, New Issues   184us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Stock Issued During Period, Value, New Issues 5,091us-gaap_StockIssuedDuringPeriodValueNewIssues 2us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
5,089us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
     
Share grants, net of share grant amortization and forfeitures 1,640us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures 1us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
1,639us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
  1,640us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
 
Share grants, net of share grant amortization and forfeitures (in shares)   123us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
       
Balance at Mar. 31, 2015 $ 837,839us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest $ 681us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
$ 1,191,123us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AdditionalPaidInCapitalMember
$ (356,531)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_RetainedEarningsMember
$ 835,273us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
$ 2,566us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_NoncontrollingInterestMember
Balance (in shares) at Mar. 31, 2015   68,126us-gaap_SharesOutstanding
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember