Employee Benefit Plans (Detail) - Stock Options Awarded Under the Company’s Stock Option Plans (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of period	10,000	20,000
Granted (in shares)	0	0
Cancelled/Forfeited	0	(10,000)
Exercised	6,000	0
Outstanding at end of period	4,000	10,000
Outstanding at beginning of period (in dollars per share)	$ 9.91	$ 9.30
Granted (in dollars per share)	$ 0.00	$ 0.00
Cancelled/Forfeited (in dollars per share)	$ 0.00	$ 8.69
Exercised (in dollars per share)	$ 9.54	$ 0.00
Outstanding at end of period (in dollars per share)	$ 10.45	$ 9.91