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RESTRICTED STOCK UNITS, STOCK OPTIONS, AND STOCK APPRECIATION RIGHTS (SARs) - Compensation Expense from Share-Based Arrangements (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Recognition of fair value of restricted stock units, stock options, and stock appreciation rights over vesting period; and issuance of common stock $ 4,318us-gaap_AllocatedShareBasedCompensationExpense $ 2,967us-gaap_AllocatedShareBasedCompensationExpense $ 3,088us-gaap_AllocatedShareBasedCompensationExpense
Contributions of stock to the Company's 401(k) plan 1,764us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount 2,355us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount 2,952us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Total share-based compensation expense $ 6,082us-gaap_ShareBasedCompensation $ 5,322us-gaap_ShareBasedCompensation $ 6,040us-gaap_ShareBasedCompensation