Stock Incentive Plans - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016 USD ($) Installment $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
New grants of stock option | shares	0
Outstanding options expiration period from the date of grant	10 years
Stock-based compensation expense included in selling, general and administrative expenses	$ 2,800,000	$ 2,400,000	$ 1,700,000
Stock-based compensation, income tax benefits	$ 1,100,000	$ 948,000	$ 675,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equal annual installments options are exercisable | Installment	4
Options exercisable period after date of grant	1 year
Weighted average fair value of stock options, granted | $ / shares	$ 17.10	$ 10.76
Stock options granted with an exercise price below market price | shares	0	0	0
Intrinsic value of stock options exercised	$ 113,000	$ 1,100,000	$ 1,000,000
Fair value of shares vested during the period	319,000	383,000	534,000
Unrecognized compensation expense	$ 718,000
Weighted average remaining amortization period	2 years 6 months
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options exercisable period after date of grant	1 year
Fair value of shares vested during the period	$ 1,900,000	$ 1,700,000	$ 820,000
Unrecognized compensation expense	$ 8,100,000
Weighted average remaining amortization period	3 years
Number of equal annual installments in which restricted stock units vest | Installment	4
Two Thousand And Fifteen Stock Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of common stock reserved for issuance under the 2015 Plan | shares	1,000,000
Aggregate number of shares for which incentive stock options may be granted under the Plan | shares	900,000
2009 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for grant | shares	792,795