Earnings Per Share - Weighted Average Shares and Share Equivalents Used to Calculate Basic and Diluted Earnings Per Share (Detail) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Weighted average number of shares outstanding used to calculate basic EPS	4,066	4,349	4,062	4,408
Dilutive securities:
Stock options and restricted share units	196	146	187	149
Weighted average number of shares and share equivalents outstanding used to calculate diluted EPS	4,262	4,495	4,249	4,557