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Debt - Additional Information (Detail) (USD $)
 6 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 0 Months Ended 0 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Mar. 13, 2013
Jun. 30, 2014
Non-US lines of credit
Jun. 30, 2014
Interest Rate Swap
Jun. 30, 2013
Interest Rate Swap
Jun. 30, 2014
Interest Rate Swap
Jun. 30, 2013
Interest Rate Swap
Mar. 13, 2013
Interest Rate Swap
Mar. 13, 2012
Term Loan
Mar. 13, 2013
Term Loan
Mar. 13, 2012
Revolving Credit Facility
Jun. 30, 2014
Revolving Credit Facility
Mar. 13, 2013
Revolving Credit Facility
Jun. 30, 2014
Domestic Revolving Credit Facility [Member]
Revolving Credit Facility
Jun. 30, 2013
Domestic Revolving Credit Facility [Member]
Revolving Credit Facility
Debt Instrument [Line Items]                                  
Secured credit facility       $ 225,000,000 $ 13,800,000             $ 75,000,000     $ 150,000,000    
Proceeds from Long-term Lines of Credit                               6,500,000 104,000,000
Repayments of Long-term Lines of Credit                               26,500,000 37,500,000
Line of credit facility, amount outstanding 0                                
Line of credit facility, term                     5 years   5 years        
Maximum covenant leverage ratio 3.25                                
Debt agreement termination costs   8,700,000                              
Debt early termination penalty payment   4,200,000                              
Penalty percentage of outstanding balance of term loan   2.75%                              
Write-off financing cost   4,500,000                              
Debt issuance cost 1,900,000                                
Remaining borrowing capacity 26,400,000                         123,600,000      
Line of Credit Facility, Increase (Decrease), Net         5,000,000                        
Notional amount of cash flow hedge                   75,000,000              
Cash flow hedge swap termination date               March 13, 2018                  
Derivative Asset, Fair Value, Gross Asset 100,000   400,000                            
Unrealized gain (loss) recorded in other comprehensive income           $ 300,000 $ 1,200,000 $ 300,000 $ 500,000