Annual report pursuant to Section 13 and 15(d)

Summary of Treasury Stock Activity (Detail)

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Summary of Treasury Stock Activity (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule of Treasury Stock [Line Items]      
Beginning Balance, Shares 3,553,085 3,391,592  
Restricted stock forfeitures 22,653 [1] 14,423 [1]  
Restricted stock withholdings 119,197 [2] 147,070 [2]  
Ending Balance, Shares 3,694,935 3,553,085 3,391,592
Beginning Balance, Cost $ 48,482 $ 45,219  
Restricted stock forfeitures    [1]    [1]  
Restricted stock withholdings 3,464 [2] 3,263 [2] 494
Ending Balance, Cost $ 51,946 $ 48,482 $ 45,219
[1] The Company repurchased forfeited and canceled restricted shares at a cost of $0.001 per share in accordance with the Company's Amended and Restated 2006 Long Term Incentive Plan.
[2] The Company withheld restricted shares as a result of the election by certain employees to satisfy their tax liabilities upon vesting in restricted stock. The Company determined the number of shares to be withheld based upon market values that ranged from $ $22.40 to $30.23 per share.