Retirement Plans - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2014
Compensation and Retirement Disclosure [Abstract]
Percentage of compensation saved by participant for which employer contributes hundred percent	100.00%
Employer matching contribution for first one percent of compensation saved	1.00%
Percentage of compensation saved by participant for which employer contributes fifty percent	50.00%
Employer matching contribution for next five percent of compensation saved	5.00%