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Long Term Debt - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]      
Proceeds from issuance of senior notes     $ 500,000,000
Carrying value of Long-term Debt $ 631,247,000 $ 553,501,000  
Pretax charge related to early redemption of senior notes     (29,833,000)
Letters of credit outstanding under the facility $ 13,000,000 15,300,000  
Middle East [Member]      
Debt Instrument [Line Items]      
Revolving credit facility, maturity date Oct. 29, 2017    
Letter of credit securing workers compensation policy $ 9,200,000    
5.25% Senior Notes due March 15, 2019 [Member]      
Debt Instrument [Line Items]      
Carrying value of Long-term Debt 500,000,000 500,000,000  
Fair market value of Senior Notes $ 474,400,000 403,100,000  
5.25% Senior Notes due March 15, 2019 [Member] | Senior Notes [Member]      
Debt Instrument [Line Items]      
Interest rate on Senior Notes 5.25%    
Percentage of principal amount redeemed 101.00%    
Debt instrument restrictive covenants The Notes contain restrictive covenants, including limitations on incurring indebtedness, creating liens, selling assets, and entering into certain transactions with affiliates. The covenants limit our ability to pay cash dividends on common stock, repurchase or redeem common or preferred equity, prepay subordinated debt, and make certain investments.    
Proceeds from issuance of senior notes     $ 493,800,000
8.625 % Senior Note due 2018 [Member] | Senior Notes [Member]      
Debt Instrument [Line Items]      
Interest rate on Senior Notes     8.625%
Carrying value of Long-term Debt     $ 300,000,000
Cost of debt repayment     329,400,000
Pretax charge related to early redemption of senior notes     (29,800,000)
Premium on early redemption of senior notes     26,700,000
Write off of unamortized financing costs     $ 3,100,000
Interest Expense Fund [Member]      
Debt Instrument [Line Items]      
Periodic payment of debt interest $ 29,200,000 $ 27,700,000  
Revolving Credit Facility [Member]      
Debt Instrument [Line Items]      
Revolving credit facility, maturity date Oct. 01, 2018    
Maximum short term investment to test fixed charge coverage ratio $ 150,000,000    
Increased Borrowing capacity $ 150,000,000    
Revolving Credit facility, Covenants, consolidated working capital ratio 200.00%    
Revolving Credit facility, Covenants, consolidated net worth ratio 150.00%    
Revolving Credit facility, Covenants, fixed coverage ratio 110.00%    
Revolving Credit facility, Covenants, consolidated net worth $ 450,000,000    
Letters of credit outstanding under the facility 7,600,000    
Letter of credit securing workers compensation policy $ 3,800,000    
Revolving Credit Facility [Member] | LIBOR [Member]      
Debt Instrument [Line Items]      
LIBOR plus interest rate on borrowed funds 225.00%