Annual report pursuant to Section 13 and 15(d)

Accounting Policies - Revenue Recognition and Accounts Receivable and Allowance (Details)

v2.4.1.9
Accounting Policies - Revenue Recognition and Accounts Receivable and Allowance (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Property Subject to or Available for Operating Lease [Line Items]    
Notes receivable, net 4.4us-gaap_NotesReceivableNet $ 6.2us-gaap_NotesReceivableNet
Office and Retail    
Property Subject to or Available for Operating Lease [Line Items]    
Lessor Leasing Arrangements, Operating Leases, Term of Contract 7 years