Earnings per Share - Basic and Diluted Per Share Calculations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Net Income (Loss) Available to Common Stockholders, Basic [Abstract]
Net income (loss)	$ 9,028	$ (9,232)	$ 2,986	$ 5,019	$ (204)	$ 8,005
Net income attributable to noncontrolling interest	(470)		314		(486)	612
Net total and comprehensive income attributable to controlling interest	9,498		2,672		282	7,393
Net Income (Loss) Available to Common Stockholders, Diluted [Abstract]
Net income	9,028	$ (9,232)	2,986	$ 5,019	(204)	8,005
Net income (loss) attributable to noncontrolling interest, diluted	(20)		314		(36)	612
Net Income (Loss) Available to Common Stockholders, Diluted, Total	$ 9,048		$ 2,672		$ (168)	$ 7,393
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic weighted average of outstanding shares of common stock (in shares)	49,499		48,742		49,358	48,569
Dilutive effect of equity awards (in shares)	396		570			615
Dilutive effect of assumed subsidiary share conversion	320				160
Diluted weighted average of outstanding shares of common stock (in shares)	50,215		49,312		49,518	49,184
Basic earnings per share (in dollars per share)	$ 0.19		$ 0.05		$ 0.01	$ 0.15
Diluted earnings (loss) per share (in dollars per share)	$ 0.18		$ 0.05		$ 0.00	$ 0.15