Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue:
Rental and parking revenue	$ 54,249	$ 47,120	$ 106,539	$ 94,014
Tenant reimbursement revenue	4,774	5,596	9,095	10,085
Real estate-related notes receivable interest income	15	216	31	355
Total revenue	59,038	52,932	115,665	104,454
Expenses:
Rental and parking expenses	7,373	7,099	14,012	14,683
General and administrative expenses	1,587	1,451	3,168	2,860
Change in fair value of contingent consideration	125	150	245	300
Acquisition related expenses	1,640	509	1,640	3,654
Asset management fees	4,877	4,533	9,664	8,566
Depreciation and amortization	17,349	16,445	34,348	32,228
Total expenses	32,951	30,187	63,077	62,291
Income from operations	26,087	22,745	52,588	42,163
Other income (expense):
Other interest and dividend income	2,706	2,603	5,411	3,119
Interest expense, net	(9,213)	(7,004)	(19,827)	(13,310)
Provision for loan losses	(1,666)	0	(1,666)	0
Total other expense	(8,173)	(4,401)	(16,082)	(10,191)
Net income	17,914	18,344	36,506	31,972
Net income attributable to noncontrolling interests in consolidated partnerships	(1,061)	(1,580)	(1,989)	(3,194)
Net income attributable to common stockholders	16,853	16,764	34,517	28,778
Other comprehensive (loss) income:
Unrealized (loss) income on interest rate swaps, net	(2,606)	1,284	(6,469)	(928)
Other comprehensive (loss) income	(2,606)	1,284	(6,469)	(928)
Other comprehensive loss (income) attributable to noncontrolling interests in consolidated partnerships	0	(148)	0	92
Other comprehensive (loss) income attributable to common stockholders	(2,606)	1,136	(6,469)	(836)
Comprehensive income	15,308	19,628	30,037	31,044
Comprehensive income attributable to noncontrolling interests in consolidated partnerships	(1,061)	(1,728)	(1,989)	(3,102)
Comprehensive income attributable to common stockholders	$ 14,247	$ 17,900	$ 28,048	$ 27,942
Weighted average number of common shares outstanding:
Basic (in shares)	182,743,182	177,731,803	182,372,560	176,928,923
Diluted (in shares)	182,762,094	177,746,071	182,392,594	176,944,475
Net income per common share attributable to common stockholders:
Basic (in dollars per share)	$ 0.09	$ 0.09	$ 0.19	$ 0.16
Diluted (in dollars per share)	0.09	0.09	0.19	0.16
Distributions declared per common share (in dollars per share)	$ 0.17	$ 0.17	$ 0.35	$ 0.34