Annual report pursuant to Section 13 and 15(d)

Summary of Stock Option Activity (Detail)

v2.4.0.6
Summary of Stock Option Activity (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Share options  
Options outstanding beginning balance 91,800
Granted   
Exercised (15,065)
Forfeited or expired (43,835)
Options outstanding ending Balance 32,900
Vested 32,900
Exercisable 32,900
Weighted average exercise price  
Weighted average exercise price, beginning balance $ 19.07
Granted   
Exercised $ 18.15
Forfeited or expired $ 18.82
Weighted average exercise price, ending balance $ 19.83
Weighted average exercise price, vested $ 19.83
Weighted average exercise price, exercisable $ 19.83
Weighted average remaining contractual term  
Weighted average remaining contractual term, outstanding 1 year 6 months
Weighted average remaining contractual term, vested 1 year 6 months
Weighted average remaining contractual term, exercisable 1 year 6 months
Aggregate intrinsic value  
Aggregate intrinsic value, outstanding $ 138
Aggregate intrinsic value, vested 138
Aggregate intrinsic value, exercisable $ 138