Stock-Based Compensation - Summary of Stock Option Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Non-vested Shares	292
Granted at fair value, Shares	0	0
Exercisable, Shares	295,627
Ending Balance, Non-vested Shares	0	292
Prior Option Plans [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Outstanding Shares	428,111
Granted at fair value, Shares
Exercise, Shares	(60,732)
Cancelled, Shares	(71,752)
Ending Balance, Outstanding Shares	295,627
Exercisable, Shares	295,627
Ending Balance, Non-vested Shares
Beginning Balance, Weighted Average Grant or Exercise Price, Outstanding	$ 20.21
Granted, Weighted Average Grant or Exercise Price
Exercised, Weighted Average Grant or Exercise Price	$ 17.16
Cancelled or Expired, Weighted Average Grant or Exercise Price	$ 16.99
Ending Balance, Weighted Average Grant or Exercise Price, Outstanding	$ 21.62
Exercisable, Weighted Average Grant or Exercise Price	$ 21.62
Non-vested, Weighted Average Grant or Exercise Price
Outstanding at December 31, 2013, Aggregate Intrinsic Value	$ 263
Exercisable at December 31, 2013, Aggregate Intrinsic Value	$ 263
Outstanding at December 31, 2013, Weighted Average Remaining Contractual Term	1 year 6 months
Exercisable at December 31, 2013, Weighted Average Remaining Contractual Term	1 year 6 months
2010 Omnibus Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Non-vested Shares	202,005
Granted at fair value, Shares	155,853
Restriction released, Shares	(103,291)
Cancelled, Shares	(3,293)
Ending Balance, Non-vested Shares	251,274
Beginning Balance, Weighted Average Grant or Exercise Price, Outstanding	$ 16.25
Granted, Weighted Average Grant or Exercise Price	$ 16.29
Restriction Released, Weighted Average Grant or Exercise Price	$ 16.17
Cancelled or Expired, Weighted Average Grant or Exercise Price	$ 17.22
Non-vested, Weighted Average Grant or Exercise Price	$ 16.30
Shares Available For Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning Balance, Available for grant	1,121,322
Restricted Stock Awards, Weighted Average Grant or Exercise Price	$ 16.29
Restricted stock awards, Shares	(155,853)
Cancelled, Shares	3,293
Ending Balance, Available for grant	968,762
Cancelled or Expired, Weighted Average Grant or Exercise Price	$ 17.22