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Share-Based Compensation - Summary of Stock Options Outstanding and Exercisable (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2013
Options Outstanding
Dec. 31, 2013
Options Exercisable
Dec. 31, 2013
Range 1
Options Outstanding
Dec. 31, 2013
Range 1
Options Exercisable
Dec. 31, 2013
Range 2
Options Outstanding
Dec. 31, 2013
Range 2
Options Exercisable
Dec. 31, 2013
Range 3
Options Outstanding
Dec. 31, 2013
Range 3
Options Exercisable
Dec. 31, 2013
Range 4
Options Outstanding
Dec. 31, 2013
Range 4
Options Exercisable
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]                            
Range of exercise prices, lower range             $ 3.87 $ 3.87 $ 9.38 $ 9.38 $ 13.11 $ 13.11 $ 15.06 $ 15.06
Range of exercise prices, upper range             $ 9.37 $ 9.37 $ 13.1 $ 13.1 $ 15.05 $ 15.05 $ 19.42 $ 19.42
Options Outstanding Weighted Average Remaining Contractual Life (Years)             4 years 11 months 2 days   1 year 5 months 22 days   3 years 7 months 4 days   4 years 5 months 19 days  
Options Outstanding Number of Options Outstanding (shares) 1,372 1,820 2,137 2,816 1,372   6   335   995   36  
Options Outstanding Weighted Average Exercise Price (usd per share) $ 14.10 $ 14.04 $ 13.87 $ 13.52 $ 14.10   $ 4.01   $ 11.92   $ 14.82   $ 16.18  
Options Outstanding Weighted Average Fair Value (usd per share) $ 6.00 $ 5.91 $ 5.84 $ 5.72 $ 6.00   $ 1.72   $ 5.95   $ 6.04   $ 6.07  
Aggregate intrinsic value         $ 24                  
Options Exercisable Number of Options Exercisable (shares) 1,372 1,820 2,126     1,372   6   335   995   36
Options Exercisable Weighted Average Exercise Price (usd per share) $ 14.10 $ 14.04 $ 13.92     $ 14.10   $ 4.01   $ 11.92   $ 14.82   $ 16.18
Options Exercisable Weighted Average Fair Value (usd per share) $ 6.00 $ 5.91 $ 5.87     $ 6.00   $ 1.72   $ 5.95   $ 6.04   $ 6.07
Aggregate intrinsic value           $ 24