Receivables and Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Receivables [Abstract]
Rents and fees receivable	$ 1,491	$ 5,892
Allowance for doubtful accounts	(635)	(1,860)
Straight-line rent receivable	86,138	63,236
Other receivables	9,952	20,395
Lease costs, net of accumulated amortization of $60,310 and $52,963, respectively	148,901	129,781
Loan costs, net of accumulated amortization of $8,746 and $7,321, respectively	9,954	10,185
Escrow and other deposits	40,444	28,263
Prepaid items	3,412	18,426
Cost method investment	3,500	3,500
Fair value of interest rate swaps	474	1,131
Deferred tax asset, non current	4,999	5,040
Other assets	1,033	1,228
Rents receivable and other assets	309,663	285,217
Accumulated amortization, lease costs	60,310	52,963
Accumulated amortization, loan costs	$ 8,746	$ 7,321