Consolidated Statement of Changes in Equity - USD ($) $ in Thousands	Total	Noncontrolling Interests subject to put provisions	Common Stock	Additional Paid-in Capital	Receivable from Noncontrolling Interest Holders	Retained Earnings (Deficit)	Accumulated Other Comprehensive Income (loss)	Noncontrolling Interests not subject to put provisions
Balance at beginning of period at Dec. 31, 2018	$ (58,970)	$ 129,099	$ 196	$ 105,715	$ (506)	$ (164,451)	$ 76	$ 168,881
Balance at beginning of period (in shares) at Dec. 31, 2018			32,603,846
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(10,479)	456				(10,479)		4,878
Stock-based compensation	1,401			1,401
Exercise of stock options (in shares)			7,721
Exercise of stock options	70			70
Forfeiture of restricted stock awards (in shares)			(16,629)
Vested restricted stock awards withheld on net share settlement (in shares)			(32,154)
Vested restricted stock awards withheld on net share settlement	(338)		$ 1	(339)
Cash dividend equivalents accrued on share-based payments	(15)			(15)
Distributions to noncontrolling interests		(2,151)						(2,599)
Contributions from noncontrolling interests	(29)	850			(29)			6,244
Purchases of equity of noncontrolling interests	50	(273)		50
Redemptions of equity of noncontrolling interests	(1,328)			(1,328)				(3,538)
Change in fair value of derivative agreements, net of tax	(785)						(785)
Change in fair value of noncontrolling interests	(1,153)	1,153		(1,153)
Balance at end of period at Mar. 31, 2019	(71,576)	129,134	$ 197	104,401	(535)	(174,930)	(709)	173,866
Balance at end of period (in shares) at Mar. 31, 2019			32,562,784
Balance at beginning of period at Dec. 31, 2019	(79,450)	126,483	$ 197	100,744	(531)	(178,241)	(1,619)	163,989
Balance at beginning of period (in shares) at Dec. 31, 2019			32,976,416
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(7,234)	1,381				(7,234)		3,525
Stock-based compensation	2,723			2,723
Exercise of stock options (in shares)			44,225
Exercise of stock options	$ 154			154
Issuance of restricted stock (in shares)	824,336
Forfeiture of restricted stock awards (in shares)			(53,654)
Vested restricted stock awards withheld on net share settlement (in shares)			(54,427)
Vested restricted stock awards withheld on net share settlement	$ (427)		$ 2	(429)
Cash dividend equivalents accrued on share-based payments	(7)			(7)
Distributions to noncontrolling interests		(3,120)						(7,628)
Contributions from noncontrolling interests	(1,037)	1,306			(1,037)			1,267
Purchases of equity of noncontrolling interests	0
Redemptions of equity of noncontrolling interests	3,448			3,448				(2,969)
Reclassification/other adjustments		(2,157)						2,157
Change in fair value of derivative agreements, net of tax	(917)						(917)
Change in fair value of noncontrolling interests	(3,844)	3,844		(3,844)
Balance at end of period at Mar. 31, 2020	$ (86,591)	$ 127,737	$ 199	$ 102,789	$ (1,568)	$ (185,475)	$ (2,536)	$ 160,341
Balance at end of period (in shares) at Mar. 31, 2020			33,736,896