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Lease Commitments And Contingencies (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Lease Commitments and Contingencies:  
Lease Commitment - 2015 $ 1,199us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent
Lease Commitment - 2016 3,591us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears
Lease Commitment - 2017 3,565us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears
Lease Commitment - 2018 3,565us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears
Lease Commitment - 2019 3,565us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears
Lease Commitment - Later years 21,992us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter
Aggregate future minimum lease payments $ 37,477us-gaap_OperatingLeasesFutureMinimumPaymentsDue