Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 65,501	$ 111,967	$ 185,311
Adjustments to reconcile net income to net cash provided by
Depreciation	70,880	80,798	83,150
Amortization of deferred loan costs, debt discounts and prepaids	4,283	4,354	5,392
Amortization of commitment fees and note receivable discounts	(872)	(729)	(867)
Amortization of lease incentives	7,555	1,026	987
Straight-line lease revenue	16,681	(14,603)	(20,411)
Non-cash rental income	(3,000)	0	0
Non-cash interest income on mortgage and other notes receivable	(4,314)	(2,614)	(3,839)
Non-cash lease deposit liability recognized as rental income	(8,838)	0	0
Gains on sales of real estate, net	(28,342)	(32,498)	(21,316)
Gain on note receivable payoff	(1,113)	0	0
Loss on operations transfer, net	710	0	0
Loss on early retirement of debt	151	1,912	3,924
Gains from equity method investment	(569)	1,545	3,126
Loan and realty losses	61,911	52,766	991
Payment of lease incentives	(1,200)	(1,042)	(623)
Non-cash share-based compensation	8,613	8,415	3,061
Changes in operating assets and liabilities:
Other assets, net	(3,534)	(4,050)	160
Accounts payable and accrued expenses	425	3,352	(6,681)
Deferred income	412	260	(217)
Net cash provided by operating activities	185,340	210,859	232,148
Cash flows from investing activities:
Investment in mortgage and other notes receivable	(79,801)	(72,236)	(58,356)
Collection of mortgage and other notes receivable	119,212	67,790	46,612
Acquisition of real estate	(6,364)	(46,817)	(102,712)
Proceeds from sales of real estate	168,958	238,864	39,631
Investments in renovations of existing real estate	(4,629)	(3,465)	(13,854)
Investments in equipment	0	(64)	(158)
Investment in equity method investment	0	0	(875)
Distributions from equity method investment	569	1,205	0
Net cash provided by (used in) investing activities	(197,945)	(185,277)	89,712
Cash flows from financing activities:
Proceeds from revolving credit facility	225,000	95,000	205,000
Payments on revolving credit facility	(183,000)	(393,000)	(207,000)
Borrowings on term loans	0	0	100,000
Payments on term loans	(135,388)	(293,316)	(43,729)
Proceeds from issuance of senior notes	0	396,784	0
Prepayment fee for early retirement of debt	0	(1,462)	(1,619)
Deferred loan costs	(4,612)	(5,018)	(1,039)
Distributions to noncontrolling interests	(916)	(910)	(748)
Proceeds from noncontrolling interests	11,738	0	13
Taxes remitted on employee stock awards	(288)	0	(2,705)
Proceeds from equity offering, net	0	47,904	34,649
Equity issuance costs	(66)	0	0
Convertible bond redemption	0	(66,076)	0
Dividends paid to stockholders	(161,771)	(182,900)	(194,584)
Payments to repurchase shares of common stock	(151,951)	0	0
Net cash used in financing activities	(401,254)	(402,994)	(111,762)
(Decrease) increase in cash and cash equivalents and restricted cash	(17,969)	(6,858)	30,674
Cash and cash equivalents and restricted cash, beginning of year	39,485	46,343	15,669
Cash and cash equivalents and restricted cash, end of year	21,516	39,485	46,343
Supplemental disclosure of cash flow information:
Interest paid, net of amounts capitalized	42,659	43,680	43,406
Supplemental disclosure of non-cash investing and financing activities:
Real estate acquired in exchange for mortgage notes receivable	23,071	0	63,220
Noncash portion of noncontrolling interest conveyed in acquisition	0	0	10,778
Increase in mortgage note receivable from sale of real estate	0	0	4,000
Change in other assets related to investments in real estate	0	0	348
Change in other assets related to sales of real estate	102	(33)	0
Change in accounts payable related to investments in real estate construction	20	(62)	784
Change in accounts payable related to renovations of existing real estate	(37)	0	0
Change in accounts payable related to distributions to noncontrolling interests	139	64	138
Operating equipment received in lease termination	1,287	0	0
Increase in accounts payable related to transfer of operations	$ 300	$ 0	$ 0