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Merger - Fair Values of Assets Acquired and Liabilities Assumed (Detail) (USD $)
In Thousands, unless otherwise specified
Oct. 04, 2014
Business Acquisition [Line Items]  
Current assets $ 787,430
Property and equipment 346,500
Goodwill 36,622
Intangible assets 28,550
Other 38,160
Total assets acquired 1,237,262
Current liabilities 342,221
Other long-term liabilities 76,531
Long-term debt and capital lease obligations 438,896
Total liabilities assumed 857,648
Net assets acquired 379,614
Initial Valuation [Member]
  
Business Acquisition [Line Items]  
Current assets 790,296
Property and equipment 369,495
Goodwill 43,584
Intangible assets 10,750
Other 38,160
Total assets acquired 1,252,285
Current liabilities 353,484
Other long-term liabilities 81,047
Long-term debt and capital lease obligations 438,140
Total liabilities assumed 872,671
Net assets acquired 379,614
Fair Value Adjustments [Member]
  
Business Acquisition [Line Items]  
Current assets (2,866)
Property and equipment (22,995)
Goodwill (6,962)
Intangible assets 17,800
Total assets acquired (15,023)
Current liabilities (11,263)
Other long-term liabilities (4,516)
Long-term debt and capital lease obligations 756
Total liabilities assumed $ (15,023)