Consolidated Statement of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 46,909	$ 33,715	$ 19,513
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	43,332	33,281	30,263
Non-cash interest income adjustments	325	79	24
Amortization of deferred financing costs	4,045	3,280	2,685
Stock-based compensation expense	9,851	7,819	8,279
Amortization of premium	(10)	(671)	(347)
Non-cash loss on extinguishment of debt	1,576	859	628
Straight-line rental income adjustments	(19,821)	(14,709)	(4,893)
Provision for doubtful accounts	600	0	0
Impairment	0	0	2,481
Change in fair value of contingent consideration	(1,560)	200	0
Write-off of straight-line rental income	2,994	0	0
Gain on sale of real estate	(3,914)	0	0
Changes in operating assets and liabilities:
Prepaid expenses and other assets	(7,993)	(3,459)	(82)
Accounts payable and accrued liabilities	12,635	5,430	1,321
Restricted cash	(3,632)	(3,725)	(3,620)
Net cash provided by operating activities	85,337	62,099	56,252
Cash flows from investing activities:
Acquisitions of real estate	(771,479)	(125,955)	(205,424)
Origination of loans receivable	(66,397)	(165,960)	(22,180)
Preferred equity investments	(15,486)	(7,038)	0
Acquisition of note receivable			(22,180)
Additions to real estate	(1,471)	(764)	(1,046)
Repayment of note receivable	1,097	0	10,000
Proceeds from sale of real estate	27,264	2,208	0
Net cash (used in) provided by investing activities	(826,472)	(297,509)	(218,650)
Cash flows from financing activities:
Proceeds from issuance of senior unsecured notes	499,250	200,000	106,000
Principal payments on senior unsecured notes	(211,250)	(113,750)	0
Net proceeds (repayments) from revolving line of credit	132,500	43,000	92,500
Proceeds from mortgage notes payable	57,703	0	56,651
Principal payments on mortgage notes payable	(89,110)	(10,994)	(62,226)
Payments of deferred financing costs	(19,131)	(8,954)	(6,800)
Payment of contingent consideration	0	(1,300)	0
Issuance of preferred stock	0	138,249	0
Issuance of common stock	510,147	34,517	53
Dividends paid	(81,489)	(58,151)	(48,929)
Net cash provided by financing activities	798,620	222,617	137,249
Net (decrease) increase in cash and cash equivalents	57,485	(12,793)	(25,149)
Cash and cash equivalents, beginning of period	4,308	17,101
Cash and cash equivalents, end of period	61,793	4,308	17,101
Supplemental disclosure of cash flow information:
Interest paid	34,468	38,541	32,613
Notes Assumed	14,102	0	0
Repayments of Preferred Equity Investments	6,949	0	0
Decrease in loans receivables/increase in real estate	$ 16,832	$ 0	$ 0