Share Based Compensation (Additional Information) (Detail) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise period				5 years 5 months 1 day	5 years 29 days
Options exercised intrinsic value				$ 417,000
Stock Options Granted, Net of Forfeitures				21,245
2015 Omnibus Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares authorizes	1,500,000			1,500,000
Common stock, shares available for issuance	1,500,000			1,500,000
Term of share based compensation plan				10 years
Minimum grant price percentage				100.00%
2015 Omnibus Stock Plan | Stock Options and Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized Compensation expense	$ 500,000		$ 400,000	$ 1,400,000	$ 1,300,000
2015 Omnibus Stock Plan | Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized Compensation expense	200,000			$ 200,000
Expected cost recognition weighted average period				2 years
Options exercised intrinsic value				$ 400,000	100,000
Stock Options Vested, Fair Value				$ 200,000	$ 200,000
Stock Options Granted		21,245		0
Vesting period		3 years
2015 Omnibus Stock Plan | Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized Compensation expense	$ 4,300,000			$ 4,300,000
Expected cost recognition weighted average period				3 years 3 months 18 days
Stock Options Granted		79,860
Vesting period		5 years