Long-term Debt (Details Textual) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 29, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015	Dec. 10, 2015
Debt Instrument [Line Items]
Property Subject to or Available for Operating Lease, Net		$ 554,000		$ 554,000		$ 563,700
Loss on debt extinguishment		0	$ 0	0	$ (2,126)
Long-term Debt		588,962		588,962
Private Placement [Member]
Debt Instrument [Line Items]
Initial value of debt	$ 625,500
Debt extinguished	408,500
Proceeds from Issuance of Private Placement	$ 211,600
Loss on debt extinguishment				2,100
Private Placement [Member] | Class A-1 Notes [Member]
Debt Instrument [Line Items]
Fixed interest rate of the notes	2.98%
Long-term Debt		213,500		213,500
Private Placement [Member] | Class A-2 Notes [Member]
Debt Instrument [Line Items]
Fixed interest rate of the notes	4.06%
Long-term Debt		375,500		375,500
2015 Notes [Domain] | Private Placement [Member]
Debt Instrument [Line Items]
Restricted Cash and Cash Equivalents		16,700		16,700		16,900
Fair value of term loan		595,400		595,400		608,400
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity							$ 200,000
Proceeds from (Repayments of) Secured Debt						$ 99,500
Line of Credit Facility, Remaining Borrowing Capacity		$ 200,000		$ 200,000
Base interest rate on credit facility				1.45%
Interest Rate at balance sheet date						1.90%