Long-Term Debt - Additional Information (Details)		1 Months Ended		3 Months Ended		6 Months Ended
	Nov. 15, 2013 USD ($)	Dec. 31, 2015 USD ($)	Nov. 30, 2014 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	May 06, 2016 USD ($)	Apr. 21, 2016 USD ($)
Debt And Credit Facility [Line Items]
Cash				$ 500,000		$ 500,000
Gain on extinguishment of debt		$ 17,911,000		38,497,000	$ 0	38,497,000	$ 0
Gain on extinguishment of debt, tax effect						13,451,000
Provision (benefit) for corporate income taxes				$ 12,899,000	$ (14,992,000)	$ 12,082,000	$ (14,728,000)
Line of Credit [Member] | 2013 Senior Credit Facility [Member]
Debt And Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 370,000,000
Maximum percentage available on line of credit due to exceeded maximum leverage ratio						25.00%
Threshold from sale of assets used towards mandatory prepayments	$ 30,000,000
Net sales proceeds from legal sale of property, accounted for as building financing arrangement						$ 43,500,000
Line of Credit [Member] | 2013 Senior Credit Facility [Member] | Leverage Ratio, Greater Than 2.50 [Member]
Debt And Credit Facility [Line Items]
Maximum leverage ratio				2.5		2.5
Excess cash flow repayment, percentage				50.00%		50.00%
Line of Credit [Member] | 2013 Senior Credit Facility [Member] | Leverage Ratio, Greater than 2.00 but Less than 2.50 [Member]
Debt And Credit Facility [Line Items]
Maximum leverage ratio				2		2
Excess cash flow repayment, percentage				25.00%		25.00%
Line of Credit [Member] | 2013 Senior Credit Facility [Member] | Leverage Ratio, Less Than or Equal to 2.00 [Member]
Debt And Credit Facility [Line Items]
Excess cash flow repayment, percentage				0.00%		0.00%
Line of Credit [Member] | 2013 Senior Credit Facility [Member] | Base Rate [Member]
Debt And Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	2.50%
Line of Credit [Member] | 2013 Senior Credit Facility [Member] | LIBOR [Member]
Debt And Credit Facility [Line Items]
Basis spread on variable rate (as a percent)	3.50%
Secured Debt [Member] | 2013 Senior Credit Facility [Member]
Debt And Credit Facility [Line Items]
Debt issuance costs	$ 5,119,000
Debt discount related to creditor fees	4,356,000
Secured Debt [Member] | 2013 Term Loan Facility [Member]
Debt And Credit Facility [Line Items]
2013 Term Loan Facility outstanding principal balance	325,000,000	275,417,000		$ 203,042,000		$ 203,042,000
Proceeds from 2013 Term Loan Facility	$ 323,375,000
Original issue discount, percentage	0.50%
Original issue discount	$ 1,625,000	6,418,000		4,308,000		$ 4,308,000
Percent of amendment fee paid to consenting lenders						0.25%
Principal payment on Term Loan Facility						$ 20,977,000
Mandatory prepayment from sale of assets			$ 13,500,000
Term after which excess cash flow is paid (in days)						95 days
Long term debt, gross less unamortized discount and debt issuance costs				197,235,000		$ 197,235,000
Unamortized debt issuance costs				1,499,000		1,499,000
Secured Debt [Member] | 2013 Term Loan Facility [Member] | Level 2 [Member]
Debt And Credit Facility [Line Items]
Fair market value of debt		104,658,000		135,277,000		$ 135,277,000
Secured Debt [Member] | 2013 Term Loan Facility [Member] | Base Rate [Member]
Debt And Credit Facility [Line Items]
Variable rate floor (as a percent)	2.00%
Secured Debt [Member] | 2013 Term Loan Facility [Member] | LIBOR [Member]
Debt And Credit Facility [Line Items]
Variable rate floor (as a percent)	1.00%
Revolving Credit Facility [Member] | 2013 Senior Credit Facility [Member]
Debt And Credit Facility [Line Items]
Repurchase face amount		29,829,000						$ 62,447,000	$ 8,705,000
Repurchase amount, fair value		$ 10,947,000						$ 25,978,000	$ 3,787,000
Percentage of face value repurchased		36.70%						41.60%	43.50%
Write off of deferred debt issuance cost		$ 249,000		545,000
Write-off of Debt Discount		$ 707,000		$ 1,561,000
Revolving Credit Facility [Member] | 2013 Revolving Loan Facility [Member]
Debt And Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 45,000,000
Maximum percentage available on line of credit due to exceeded maximum leverage ratio						25.00%
Maximum leverage ratio				4.50		4.50
Unutilized portion of the 2013 Revolving Loan Facility				$ 42,149,000		$ 42,149,000
Available portion currently available revolving facility				11,250,000		11,250,000
Letter of Credit [Member] | 2013 Senior Credit Facility [Member]
Debt And Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 5,500,000
Letter of Credit [Member] | 2013 Revolving Loan Facility [Member]
Debt And Credit Facility [Line Items]
Letters of credit outstanding				$ 2,851,000		$ 2,851,000