Income Taxes Income Taxes (Deferred Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
Deferred tax assets related to
Accounts receivable	$ 3,780	$ 753
Inventory	4,725	1,667
Deferred Tax Assets, Goodwill and Intangible Assets	0	22,932
Deferred Tax Assets Accrued Compensation	5,462	1,555
Deferred Tax Assets Insurance Deductible Reserves	14,186	13,496
Deferred Tax Assets Stock Based Compensation	2,759	1,240
Deferred Tax Assets Restructuring Reserves	4,008	0
Other accrued liabilities	918	821
Deferred Tax Asset Federal Operating Loss Carryforward	32,361	30,480
Deferred Tax Assets State NOL Carryforward	5,036	1,211
Other	283	404
Deferred tax assets, gross	73,518	74,559
Valuation allowance	(126)	0		$ (75,248)	$ (84,629)
Total deferred tax assets	73,392	74,559
Deferred tax liabilities related to
Goodwill and intangibles	(32,452)	(33)
Property and equipment	(42,261)	(2,941)
Other assets	(1,700)	(1,093)
Total deferred tax liabilities	76,413	4,067
Net deferred tax (liability) asset		$ 70,492	$ 76,100
Net deferred tax (liability) asset	$ (3,021)