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, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings per share
Net income	$ 2,986	$ 5,019	$ 1,035	$ 1,382	$ 8,005	$ 2,417
Net income attributable to noncontrolling interest	314		420		612	643
Net total and comprehensive income attributable to controlling interest	$ 2,672		$ 615		$ 7,393	$ 1,774
Basic weighted average of outstanding shares of common stock (in shares)	48,742		14,214		48,569	10,321
Dilutive effect of equity awards (in shares)	570		242		615	122
Diluted weighted average of outstanding shares of common stock (in shares)	49,312		14,456		49,184	10,443
Basic earnings per share (in dollars per share)	$ 0.05		$ 0.04		$ 0.15	$ 0.17
Diluted earnings per share (in dollars per share)	$ 0.05		$ 0.04		$ 0.15	$ 0.17