Future Minimum Lease Payments Under Capital Lease Obligations (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Loss Contingencies [Line Items]  
Capital leases minimum lease payments, 2014 $ 5,228
Capital leases minimum lease payments, 2015 5,082
Capital leases minimum lease payments, 2016 4,580
Capital leases minimum lease payments, 2017 4,201
Capital leases minimum lease payments, 2018 1,188
Capital leases minimum lease payments, thereafter   
Total minimum lease payments 20,279
Less amount representing executor costs (266)
Net minimum lease payments 20,013
Less amount representing interest (3.30% at December 31, 2013) (1,195)
Present value of net minimum lease payments $ 18,818