Organization and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Significant Accounting Policies [Line Items]
Depreciation expense	$ 206,200,000	$ 190,500,000	$ 145,700,000
Salvage value as a percentage of operational asset's acquisition cost	10.00%
Deposits	1,500,000	7,300,000
Customer Concentration Risk | Sales Revenue, Net [Member] | Chevron Texaco Exploration and Production [Member]
Significant Accounting Policies [Line Items]
Concentration of risk percentage	15.00%
Customer Concentration Risk | Sales Revenue, Net [Member] | Pemex [Member]
Significant Accounting Policies [Line Items]
Concentration of risk percentage		12.00%
Customer Concentration Risk | Sales Revenue, Net [Member] | Oxy Inc [Member]
Significant Accounting Policies [Line Items]
Concentration of risk percentage		10.00%
Customer Concentration Risk | Accounts Receivable | Pemex [Member]
Significant Accounting Policies [Line Items]
Concentration of risk percentage	19.00%	31.00%
Maximum
Significant Accounting Policies [Line Items]
Cash in bank deposit and brokerage accounts guaranteed by FDIC	$ 250,000
Capital lease, terms	60 months
Capitalized internal-use software, useful life	7 years
Minimum
Significant Accounting Policies [Line Items]
Accounts reviewed for collectability, days past due from invoice date	150 days
Capital lease, terms	55 months
Capitalized internal-use software, useful life	5 years
The likelihood that some portion or all of the deferred tax assets will not be realized in future periods	50.00%