Stock-Based Compensation - Additional Information (Detail) (USD $)	0 Months Ended	6 Months Ended		0 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended
	Mar. 03, 2014	Jun. 30, 2014	Jun. 30, 2013	Mar. 03, 2014 Restricted Stock [Member]	Jun. 30, 2014 Restricted Stock [Member]	Jun. 30, 2014 Restricted Stock [Member]	Jun. 30, 2014 Restricted Stock [Member] Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted				99,289			25,488
Restricted stock granted, grant date fair value				$ 9.94			$ 9.62
Restricted stock award, vesting period	2 years						1 year
Restricted stock award, percentage vested on grant date	33.33%
Stock-based compensation expense		$ 522,000	$ 769,000		$ 300,000	$ 900,000
Nonvested restricted shares outstanding					144,044	144,044
Unrecognized compensation cost					$ 1,000,000	$ 1,000,000
Unrecognized compensation cost, recognition period						20 months