Debt and Financing (Details) | 3 Months Ended | 12 Months Ended | | |
Mar. 31, 2016USD ($) | Mar. 31, 2015USD ($) | Mar. 31, 2016USD ($) | Dec. 31, 2015USD ($) | Dec. 31, 2014USD ($) |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Gross | $ 1,078,100,000 | | $ 1,078,100,000 | | |
Premium/(Discount), Debt | (3,900,000) | | (3,900,000) | | |
Debt Issuance Cost | (14,000,000) | | (14,000,000) | | |
Book Value | 1,060,200,000 | | 1,060,200,000 | | |
Book Value, Current Maturities | (16,000,000) | | (16,000,000) | $ (15,900,000) | |
Par Value, Excluding Current Maturities | 1,062,100,000 | | 1,062,100,000 | | |
Debt Instrument, Unamortized Discount (Premium), Net, Noncurrent Maturities | 3,900,000 | | 3,900,000 | | |
Book Value, Excluding Current Maturities | 1,044,200,000 | | 1,044,200,000 | 1,046,500,000 | |
Cash and cash equivalents | 184,900,000 | $ 136,400,000 | 184,900,000 | 173,800,000 | $ 171,100,000 |
Operating leases, future minimum payments, remainder of fiscal year | 67,200,000 | | 67,200,000 | | |
Operating leases, future minimum payments due | 290,200,000 | | 290,200,000 | | |
Acquisition of property and equipment | (19,800,000) | $ (21,300,000) | | | |
Carrying Amount [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Fair Value | 1,060,200,000 | | 1,060,200,000 | 1,062,400,000 | |
Fair Value [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Fair Value | 903,200,000 | | 903,200,000 | 979,600,000 | |
Term Loan | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Gross | 684,300,000 | | 684,300,000 | | |
Premium/(Discount), Debt | (3,900,000) | | (3,900,000) | | |
Debt Issuance Cost | (11,700,000) | | (11,700,000) | | |
Book Value | 668,700,000 | | 668,700,000 | | |
Debt Instrument, Gross, Current Maturities | (7,000,000) | | (7,000,000) | | |
Premium/(Discount), Current Maturities | 0 | | 0 | | |
Deferred Finance Costs, Current, Net | 0 | | 0 | | |
Book Value, Current Maturities | $ (7,000,000) | | $ (7,000,000) | | |
Stated Interest Rate | 8.00% | | 8.00% | | |
Average Effective Interest Rate | 8.20% | | 8.20% | | |
Term Loan | Carrying Amount [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Fair Value | $ 668,700,000 | | $ 668,700,000 | 669,000,000 | |
Term Loan | Fair Value [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Fair Value | 555,000,000 | | 555,000,000 | 594,600,000 | |
Line of Credit [Member] | 2014 ABL Facility Credit Agreement [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Gross | 0 | | 0 | | |
Premium/(Discount), Debt | 0 | | 0 | | |
Debt Issuance Cost | 0 | | 0 | | |
Book Value | 0 | | 0 | | |
Borrowing base | 442,900,000 | | 442,900,000 | | |
Line of credit facility, total cash and availability | 81,500,000 | | 81,500,000 | | |
Secured Second A&R CDA [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Gross | 44,000,000 | | 44,000,000 | | |
Premium/(Discount), Debt | 0 | | 0 | | |
Debt Issuance Cost | (300,000) | | (300,000) | | |
Book Value | $ 43,700,000 | | $ 43,700,000 | | |
Average Effective Interest Rate | 7.30% | | 7.30% | | |
Stated Interest Rate, Minimum | 3.30% | | | | |
Stated Interest Rate, Maximum | 18.30% | | | | |
Unsecured Second A&R CD [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Gross | $ 73,200,000 | | $ 73,200,000 | | |
Premium/(Discount), Debt | 0 | | 0 | | |
Debt Issuance Cost | (400,000) | | (400,000) | | |
Book Value | $ 72,800,000 | | $ 72,800,000 | | |
Average Effective Interest Rate | 7.30% | | 7.30% | | |
Stated Interest Rate, Minimum | 3.30% | | | | |
Stated Interest Rate, Maximum | 18.30% | | | | |
Lease Financing Obligations [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Gross | $ 276,600,000 | | $ 276,600,000 | | |
Premium/(Discount), Debt | 0 | | 0 | | |
Debt Issuance Cost | (1,600,000) | | (1,600,000) | | |
Book Value | 275,000,000 | | 275,000,000 | | |
Debt Instrument, Gross, Current Maturities | (9,000,000) | | (9,000,000) | | |
Premium/(Discount), Current Maturities | 0 | | 0 | | |
Deferred Finance Costs, Current, Net | 0 | | 0 | | |
Book Value, Current Maturities | $ (9,000,000) | | $ (9,000,000) | | |
Average Effective Interest Rate | 12.00% | | 12.00% | | |
Stated Interest Rate, Minimum | 9.00% | | | | |
Stated Interest Rate, Maximum | 18.20% | | | | |
Lease Financing Obligations [Member] | Carrying Amount [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Fair Value | $ 275,000,000 | | $ 275,000,000 | 276,300,000 | |
Lease Financing Obligations [Member] | Fair Value [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Fair Value | 253,100,000 | | 253,100,000 | 282,900,000 | |
Letter of Credit [Member] | 2014 ABL Facility Credit Agreement [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Letters of credit outstanding, amount | 361,400,000 | | 361,400,000 | | |
10 percent of Borrowing Base | 44,300,000 | | 44,300,000 | | |
10 percent of line cap | 45,000,000 | | 45,000,000 | | |
Other Debt Obligations [Member] | Carrying Amount [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Fair Value | 116,500,000 | | 116,500,000 | 117,100,000 | |
Other Debt Obligations [Member] | Fair Value [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Long-term Debt, Fair Value | $ 95,100,000 | | $ 95,100,000 | $ 102,100,000 | |
Credit Agreement Amendment, September 2014 [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Maximum Total Leverage Ratio, March 31, 2016 | 4 | | | | |
Maximum Total Leverage Ratio, June 30, 2016 | 3.75 | | | | |
Maximum Total Leverage Ratio, September 30, 2016 | 3.75 | | | | |
Maximum Total Leverage Ratio, December 31, 2016 | 3.5 | | | | |
Maximum Total Leverage Ratio, March 31, 2017 | 3.25 | | | | |
Maximum Total Leverage Ratio, June 30, 2017 | 3.25 | | | | |
Maximum Total Leverage Ratio, September 30, 2017 | 3.25 | | | | |
Maximum Total Leverage Ratio, December 31, 2017 and thereafter | 3 | | | | |
Debt Instrument, Total Leverage Ratio | | | 3.20 | | |
2014 ABL Facility Credit Agreement [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Amount able to be drawn | $ 37,200,000 | | | | |
2014 ABL Facility Credit Agreement [Member] | Line of Credit [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Line of credit facility, total cash and availability | 222,100,000 | | $ 222,100,000 | | |
Revenue Equipment [Member] | | | | | |
Debt Instrument [Line Items] | | | | | |
Operating lease commitment | $ 29,500,000 | | $ 29,500,000 | | |
Operating lease term | 5 years | | | | |
London Interbank Offered Rate (LIBOR) [Member] | Term Loan | | | | | |
Debt Instrument [Line Items] | | | | | |
Floor interest rate | 1.00% | | 1.00% | | |
Basis Spread On Variable Rate, Total Leverage Ratio Less Than 3.25 | 7.00% | | | | |
Basis Spread On Variable Rate, Total Leverage Ratio Higher Than 3.25 | 7.25% | | | | |
Debt Instrument, Total Leverage Ratio | 3.25 | | | | |