Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows From Operating Activities:
Net loss	$ (66,281)	$ (37,789)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	115,756	93,964
Amortization of debt issuance costs and discounts	2,668	4,013
Loss on early extinguishment of debt and write-off of discounts and debt issuance costs		20,348
Loss on sale or disposal of assets	6,719	3,744
Loss on derivatives	1	287
Deferred income tax benefit	(44,372)	(24,268)
Equity-based compensation	32,051	3,251
Changes in assets and liabilities:
Accounts receivable	(23,460)	(22,608)
Inventories	(10,821)	(5,615)
Prepaid expenses and other current assets	228	511
Accounts payable	18,179	26,780
Accrued salaries, wages and benefits	(639)	4,610
Deferred revenue	76,991	71,485
Other accrued expenses	4,301	3,057
Other assets and liabilities	416	312
Net cash provided by operating activities	111,737	142,082
Cash Flows From Investing Activities:
Capital expenditures	(103,224)	(83,534)
Change in restricted cash	198	(179)
Net cash used in investing activities	(103,026)	(83,713)
Cash Flows From Financing Activities:
Proceeds from the issuance of debt		280,000
Repayment of long-term debt	(8,425)	(267,725)
Proceeds from draw on revolving credit facility	70,000	45,000
Repayment of revolving credit facility	(20,000)	(45,000)
Dividends paid to stockholders	(38,781)	(36,262)
Debt issuance costs		(4,571)
Redemption premium payment		(14,300)
Payment of tax withholdings on equity-based compensation through shares withheld	(1,324)	(836)
Exercise of stock options	82
Purchase of treasury stock		(5,650)
Net cash provided by (used in) financing activities	1,552	(49,344)
Change in Cash and Cash Equivalents	10,263	9,025
Cash and Cash Equivalents—Beginning of period	18,971	43,906
Cash and Cash Equivalents—End of period	29,234	52,931
Supplemental Disclosures of Noncash Investing and Financing Activities
Capital expenditures in accounts payable	26,375	18,984
Dividends declared, but unpaid	$ 18,849	$ 18,391