Notes Payable and Borrowings under Capital Leases - Additional Information (Details)	1 Months Ended			12 Months Ended
	Mar. 31, 2015 USD ($)	May. 31, 2014 USD ($)	Mar. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Jul. 31, 2014 USD ($)
Debt Instrument [Line Items]
Interest and debt expense				$ 19,449,000	$ 54,193,000	$ 45,724,000
Minimum
Debt Instrument [Line Items]
Debt instrument covenant interest coverage ratio				3.50
Maximum
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio				4.25
Second lien credit facility
Debt Instrument [Line Items]
Repayments of lines of credit			$ 190,000,000
Penalty paid			3,800,000
First lien credit facility
Debt Instrument [Line Items]
Repayments of lines of credit		$ 25,000,000	25,000,000
Lien of credit amount amortized		$ 500,000	$ 5,000,000	$ 6,100,000
Unused portion of the revolving credit facility				59,500,000
Debt issuance costs				11,100,000
Deferred financing costs				8,000,000
Interest and debt expense				3,100,000
Gains (losses) on extinguishment of debt				$ (9,000,000)
First lien credit facility | Tranche A term loans
Debt Instrument [Line Items]
Line of credit facility							$ 375,000,000
Credit facility, maturity date				Jul. 09, 2019
Increase (decrease) in interest rate				0.25%
First lien credit facility | Tranche A term loans | Installment period 1
Debt Instrument [Line Items]
Frequency of payment				Quarterly
Beginning date of payment				Dec. 31, 2014
Ending date of payment				Dec. 31, 2016
Percentage of principal amount to be paid				5.00%
First lien credit facility | Tranche A term loans | Installment period 2
Debt Instrument [Line Items]
Frequency of payment				Quarterly
Beginning date of payment				Dec. 31, 2016
Ending date of payment				Dec. 31, 2018
Percentage of principal amount to be paid				7.50%
First lien credit facility | Tranche A term loans | Installment period 3
Debt Instrument [Line Items]
Frequency of payment				Quarterly
Beginning date of payment				Dec. 31, 2018
Ending date of payment				Jun. 30, 2019
Percentage of principal amount to be paid				10.00%
First lien credit facility | Tranche A term loans | LIBOR
Debt Instrument [Line Items]
Margin for term loans				2.75%
First lien credit facility | Tranche A term loans | Prime lending rate
Debt Instrument [Line Items]
Margin for term loans				1.75%
First lien credit facility | Tranche B term loans
Debt Instrument [Line Items]
Repayments of lines of credit	$ 25,000,000
Lien of credit amount amortized	$ 400,000
Line of credit facility							200,000,000
Credit facility, maturity date				Jul. 09, 2017
Commitment fee percentage				0.50%
Percentage of prepayment in excess cash flow				50.00%
Frequency of payment				Quarterly
Percentage of principal amount to be paid				1.00%
First lien credit facility | Tranche B term loans | Prepayment condition 1
Debt Instrument [Line Items]
Percentage of prepayment in excess cash flow				25.00%
First lien credit facility | Tranche B term loans | Prepayment condition 2
Debt Instrument [Line Items]
Percentage of prepayment in excess cash flow				0.00%
First lien credit facility | Tranche B term loans | Minimum
Debt Instrument [Line Items]
Commitment fee percentage				0.375%
First lien credit facility | Tranche B term loans | Minimum | Prepayment condition 1
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio				3.00
First lien credit facility | Tranche B term loans | Maximum
Debt Instrument [Line Items]
Working capital less than $10 million				$ 10,000,000
First lien credit facility | Tranche B term loans | Maximum | Prepayment condition 1
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio				3.75
First lien credit facility | Tranche B term loans | Maximum | Prepayment condition 2
Debt Instrument [Line Items]
Debt instrument covenant leverage ratio				3.00
First lien credit facility | Tranche B term loans | LIBOR
Debt Instrument [Line Items]
Margin for term loans				2.75%
First lien credit facility | Tranche B term loans | Prime lending rate
Debt Instrument [Line Items]
Margin for term loans				1.75%
First lien credit facility | Tranche B-1 term loan
Debt Instrument [Line Items]
Prepayment of debt				$ 12,700,000
First lien credit facility | Revolving credit facility
Debt Instrument [Line Items]
Line of credit facility							$ 75,000,000
First lien credit facility | Letter of credit
Debt Instrument [Line Items]
Line of credit facility				40,000,000
First lien credit facility | Swingline
Debt Instrument [Line Items]
Line of credit facility				$ 10,000,000