Joint Ventures - Unconsolidated JV - Busy Bee JV (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Investments
Notes receivable, net	$ 10,877	$ 3,252
Summarized financial information
Property and equipment, net	20,846	19,018
Cash and cash equivalents	106,794	185,716	$ 195,155
Other assets	63,243	52,069
Total assets	1,037,324	909,233
Debt, net	158,915	92,529
Other liabilities	72,035	57,200
Equity	568,170	529,670	533,111	$ 592,584
Total liabilities and equity	1,037,324	909,233
Total revenue	160,555	127,085	110,276
Cost of revenue	77,776	64,086	51,317
Other operating expenses	22,906	21,389	20,557
Depreciation and amortization	12,788	10,287	8,998
Total expenses	113,470	95,762	80,872
Operating income	47,085	31,323	29,404
Interest expense	(13,564)	(12,302)	(11,840)
Other (expense) income, net	1,329	4,133	1,152
Total other income, net	12,731	4,862	1,462
Net income	45,480	26,661	$ 31,602
Busy Bee JV (SJBB, LLC)
Investments
Investment in unconsolidated joint venture	1,200
Value of land contributed	1,400
Notes receivable, net	200
Cash contributed by JV partner	$ 1,200
Ownership percentage	50.00%
Busy Bee JV (SJBB, LLC)
Summarized financial information
Property and equipment, net	$ 8,466	3,886
Cash and cash equivalents	227	36
Other assets	717	28
Total assets	9,410	3,950
Debt, net	6,532	1,349
Other liabilities	506	181
Equity	2,372	2,420
Total liabilities and equity	9,410	$ 3,950
Total revenue	5,846
Cost of revenue	4,364
Other operating expenses	1,057
Depreciation and amortization	229
Total expenses	5,650
Operating income	196
Interest expense	(99)
Other (expense) income, net	(145)
Total other income, net	(244)
Net income	$ (48)