Stock-Based Compensation - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under Omnibus Incentive Plan	1,000,000		1,000,000
Stock options vesting period years			3 years
Stock options exercise price			$ 17.16
Stock options fair value			$ 5.82
Expected life, years			6 years
Risk-free interest rate			1.26%
Expected dividend yield			4.20%
Expected forfeiture rate			5.00%
Expected volatility rate			52.68%
Stock-based compensation expense for non-qualified stock options to selected employees	$ 961		$ 961
Requisite service period, years			3 years
Fair market value of fully vested shares as of the grant date	25		25
Shares of common stock issued to non-management directors			11,656
Stock-based compensation expense	208	266	504	665
Income tax benefit from stock-based compensation expense	$ 72	$ 93	$ 176	$ 233
Non Qualified Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted to selected employees			173,750
Stock options life, years			10 years