Deferred Costs, Acquired Lease Intangibles and Goodwill - Future Amortization Expense and Rental Revenue (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Future Amortization Expense [Abstract]
Future Amortization Expense	$ 249,983
Future Rental Revenue [Abstract]
2014	7,484
2015	6,665
2016	5,997
2017	6,384
2018	6,086
Thereafter	28,001
Future Rental Revenue	60,617
Lease Agreements [Member]
Future Amortization Expense [Abstract]
2014	30,466
2015	24,737
2016	20,873
2017	19,237
2018	16,363
Thereafter	131,354
Future Amortization Expense	$ 243,030