Acquisitions Pro Forma (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended								12 Months Ended
	Apr. 03, 2017	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenues		$ 210,421	$ 207,598	$ 204,776	$ 202,321	$ 181,089	$ 187,652	$ 183,148	$ 180,127	$ 825,116	$ 723,942	$ 654,420
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest		$ (8,051)	$ (28,215)	$ (2,797)	$ 9,578	$ (10,968)	$ (11,707)	$ 14,701	$ 8,369	$ (29,485)	$ 394	$ 10,145
Earnings Per Share, Diluted		$ (0.19)	$ (0.66)	$ (0.07)	$ 0.22	$ (0.26)	$ (0.27)	$ 0.34	$ 0.20	$ (0.70)	$ 0.01	$ 0.27
AmCo Holding Company
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Revenues											$ 654,420
Pro Forma Revenue	$ 38,096										692,516
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest											10,145
Pro Forma Net Income (Loss)	$ 6,712										$ 16,857
Earnings Per Share, Diluted											$ 0.27
Pro Forma Earnings Per Share, Diluted	$ 0.00										$ 0.39