Discontinued Operations - Cash Flow (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from discontinued operating activities:
Depreciation		$ 10,582	$ 18,769	$ 18,542
Asset impairment charge		0	23,378	0
Stock-based compensation		5,414	8,993	7,543
Deferred income taxes		71	(545)	(22,996)
Discontinued Operations
Cash flows from discontinued operating activities:
Depreciation			6,711	7,825
Amortization			5,153	5,026
Asset impairment charge	$ 9,203		9,203
Stock-based compensation			6	57
Deferred income taxes		2,835	345	(3,940)
Cash flows from discontinued investing activities:
Purchase of property and equipment			6,725	4,527
Human Services | Discontinued Operations
Cash flows from discontinued operating activities:
Depreciation			0	0
Amortization			0	0
Stock-based compensation			0	0
Deferred income taxes		3,165	419	(3,433)
Cash flows from discontinued investing activities:
Purchase of property and equipment			0	0
WD Services | Discontinued Operations
Cash flows from discontinued operating activities:
Depreciation			6,711	7,825
Amortization			5,153	5,026
Stock-based compensation			6	57
Deferred income taxes		$ (330)	(74)	(507)
Cash flows from discontinued investing activities:
Purchase of property and equipment			$ 6,725	$ 4,527