Income Taxes Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Components of Deferred Tax Assets [Abstract]
Domestic net operating loss carryforward	$ 102,827	$ 96,777
Intangibles	12,145	14,875
Foreign net operating loss carryforward	8,007	9,582
Interest expense deduction limitation carryforward	6,649	2,495
Property and equipment	3,656	5,291
Employee stock-based compensation	3,124	3,271
Employee benefits and insurance claims accruals	2,422	5,374
Operating lease liabilities	1,832	0
Accounts receivable reserve	187	325
Inventory	202	236
Accrued expenses	233	190
Deferred revenue	124	560
Deferred Tax Assets, Gross	141,408	138,976
Valuation allowance	(59,842)	(62,639)
Components of Deferred Tax Liabilities [Abstract]
Property and equipment	(72,350)	(79,606)
Operating lease assets	(1,686)	0
Accrued expenses	0	(419)
Unbilled revenue	(407)	0
Net deferred tax assets (liabilities)		$ (3,688)
Deferred Tax Assets, Net	$ 7,123