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Share-Based Compensation - Summary of Stock Option Activity (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Options      
Beginning Balance (shares) 1,820 2,137 2,816
Granted (shares) 0 0 0
Exercised (shares) (4) (114) (647)
Cancelled or expired (shares) (444) (203) (32)
Ending Balance (shares) 1,372 1,820 2,137
Exercisable at end of period (shares) 1,372 1,820 2,126
Weighted Average Exercise Price      
Beginning Balance (usd per share) $ 14.04 $ 13.87 $ 13.52
Granted (usd per share) $ 0.00 $ 0.00 $ 0.00
Exercised (usd per share) $ 3.87 $ 9.76 $ 12.29
Cancelled or expired (usd per share) $ 13.93 $ 14.68 $ 13.89
Ending Balance (usd per share) $ 14.10 $ 14.04 $ 13.87
Exercisable at end of period (usd per share) $ 14.10 $ 14.04 $ 13.92
Weighted Average Fair Value      
Beginning Balance (usd per share) $ 5.91 $ 5.84 $ 5.72
Granted (usd per share) $ 0.00 $ 0.00 $ 0.00
Exercised (usd per share) $ 1.67 $ 4.83 $ 5.31
Cancelled or expired (usd per share) $ 5.65 $ 5.91 $ 5.86
Ending Balance (usd per share) $ 6.00 $ 5.91 $ 5.84
Exercisable at end of period (usd per share) $ 6.00 $ 5.91 $ 5.87