Debt and Financing (Details) | Jun. 30, 2016USD ($) | Jun. 30, 2016USD ($) | Jun. 27, 2016USD ($) | Jun. 30, 2015USD ($) | Mar. 31, 2016USD ($) | Dec. 31, 2015USD ($) | Mar. 31, 2015USD ($) | Dec. 31, 2014USD ($) |
Debt Instrument [Line Items] | | | | | | | | |
Long-term Debt, Gross | $ 1,060,800,000 | $ 1,060,800,000 | | | | | | |
Premium/(Discount), Debt | (3,600,000) | (3,600,000) | | | | | | |
Debt Issuance Cost | (12,800,000) | (12,800,000) | | | | | | |
Book Value | 1,044,400,000 | 1,044,400,000 | | | | | | |
Book Value, Current Maturities | (16,400,000) | (16,400,000) | | | | $ (15,900,000) | | |
Par Value, Excluding Current Maturities | 1,044,400,000 | 1,044,400,000 | | | | | | |
Debt Instrument, Unamortized Discount (Premium), Net, Noncurrent Maturities | 3,600,000 | 3,600,000 | | | | | | |
Book Value, Excluding Current Maturities | 1,028,000,000 | 1,028,000,000 | | | | 1,046,500,000 | | |
Debt Instrument, Borrowing Base Cash Release As Percent Of Collateral | 0.10 | | $ 0.15 | | | | | |
Cash and cash equivalents | 243,500,000 | 243,500,000 | | | | 173,800,000 | $ 196,000,000 | $ 171,100,000 |
Operating leases, future minimum payments, remainder of fiscal year | 47,300,000 | 47,300,000 | | | | | | |
Operating leases, future minimum payments due | 299,800,000 | 299,800,000 | | | | | | |
Acquisition of property and equipment | | (47,300,000) | | $ (42,600,000) | | | | |
Carrying Amount [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Long-term Debt, Fair Value | 1,044,400,000 | 1,044,400,000 | | | | 1,062,400,000 | | |
Fair Value [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Long-term Debt, Fair Value | 977,000,000 | 977,000,000 | | | | 979,600,000 | | |
Term Loan | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Long-term Debt, Gross | 682,500,000 | 682,500,000 | | | | | | |
Premium/(Discount), Debt | (3,600,000) | (3,600,000) | | | | | | |
Debt Issuance Cost | (10,600,000) | (10,600,000) | | | | | | |
Book Value | 668,300,000 | 668,300,000 | | | | | | |
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 | $ 668,300,000 | $ 668,300,000 | | | | 669,000,000 | | |
Term Loan | Fair Value [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Long-term Debt, Fair Value | 621,600,000 | 621,600,000 | | | | 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 | 435,500,000 | 435,500,000 | | | | | | |
Line of credit facility, total cash and availability | 78,900,000 | 78,900,000 | | | | | | |
Secured Second A&R CDA [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Long-term Debt, Gross | 30,500,000 | 30,500,000 | | | | | | |
Premium/(Discount), Debt | 0 | 0 | | | | | | |
Debt Issuance Cost | (200,000) | (200,000) | | | | | | |
Book Value | $ 30,300,000 | $ 30,300,000 | | | | | | |
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 | (500,000) | (500,000) | | | | | | |
Book Value | $ 72,700,000 | $ 72,700,000 | | | | | | |
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 | $ 274,600,000 | $ 274,600,000 | | | | | | |
Premium/(Discount), Debt | 0 | 0 | | | | | | |
Debt Issuance Cost | (1,500,000) | (1,500,000) | | | | | | |
Book Value | 273,100,000 | 273,100,000 | | | | | | |
Debt Instrument, Gross, Current Maturities | (9,400,000) | (9,400,000) | | | | | | |
Premium/(Discount), Current Maturities | 0 | 0 | | | | | | |
Deferred Finance Costs, Current, Net | 0 | 0 | | | | | | |
Book Value, Current Maturities | $ (9,400,000) | $ (9,400,000) | | | | | | |
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 | $ 273,100,000 | $ 273,100,000 | | | | 276,300,000 | | |
Lease Financing Obligations [Member] | Fair Value [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Long-term Debt, Fair Value | 260,900,000 | 260,900,000 | | | | 282,900,000 | | |
Letter of Credit [Member] | 2014 ABL Facility Credit Agreement [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Letters of credit outstanding, amount | 356,600,000 | 356,600,000 | | | | | | |
10 percent of Borrowing Base | 43,600,000 | 43,600,000 | | | | | | |
10 percent of line cap | | | | | $ 45,000,000 | | | |
Other Debt Obligations [Member] | Carrying Amount [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Long-term Debt, Fair Value | 103,000,000 | 103,000,000 | | | | 117,100,000 | | |
Other Debt Obligations [Member] | Fair Value [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Long-term Debt, Fair Value | 94,500,000 | $ 94,500,000 | | | | $ 102,100,000 | | |
Credit Agreement Amendment, September 2014 [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
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 | | | | | 3.32 | | | |
2014 ABL Facility Credit Agreement [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Amount able to be drawn | | $ 35,300,000 | | | | | | |
2014 ABL Facility Credit Agreement [Member] | Line of Credit [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Line of credit facility, total cash and availability | 278,800,000 | 278,800,000 | | | | | | |
Revenue Equipment [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Operating lease commitment | $ 58,400,000 | $ 58,400,000 | | | | | | |
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% | | | | | | |
London Interbank Offered Rate (LIBOR) [Member] | ABL Facility [Member] | | | | | | | | |
Debt Instrument [Line Items] | | | | | | | | |
Basis spread on variable rate | 1.75% | | 2.25% | | | | | |