Income Taxes - Deferred Tax Assets And Liabilities Due To Temporary Differences (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Taxes
Reserve for receivables, current		$ 411
Accrued liabilities and inventory reserves, current		6,019
Unrealized losses on interest rate swap contracts, current		8,971
Other, current		1,043
Subtotal, current		16,444
Valuation allowance		(100)
Current deferred tax assets		16,344
Reserve for receivables, noncurrent	$ 667
Accrued liabilities and inventory reserves, noncurrent	7,472
Net operating loss carryforward, non-current	8,779	17,282
Unrealized loss on derivative instruments, non-current	5,452	8,411
Share-based compensation, non-current	11,455	10,755
Asset retirement obligations, non-current	3,300	3,042
Tangible and intangible assets, non-current	13,343	17,322
Deferred revenue, non-current	878	434
Other, non-current	3,340	5,593
Subtotal, non-current	54,686	62,839
Valuation allowance	(3,094)	(12,221)
Non-current deferred tax assets	51,592	50,618
Tangible and intangible assets, non-current	(66,116)	(60,418)
Asset retirement obligations, non-current	(97)	(123)
Non-current deferred tax liability	(66,213)	(60,541)
Net deferred tax asset		$ 6,421
Deferred Tax Liabilities, Net, Total	$ 14,621