Stockholders' Equity - Additional Information (Detail)			3 Months Ended		4 Months Ended	12 Months Ended
	Oct. 22, 2015 shares	May. 07, 2014	Sep. 30, 2015 USD ($) shares	Jun. 30, 2014 USD ($) $ / shares shares	Feb. 10, 2014 shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($) shares	Oct. 23, 2014 shares	Apr. 30, 2014 shares	Apr. 19, 2014 USD ($)	Feb. 28, 2014 $ / shares	Oct. 24, 2013 USD ($)	Sep. 30, 2013 USD ($)	Aug. 01, 2013 USD ($)
Equity, Class of Treasury Stock [Line Items]
Stock split description						The stock split was in the form of a stock dividend distributed on May 7, 2014 to stockholders of record at the close of business on April 7, 2014. The stock split entitled each stockholder to receive one additional share of common stock, par value $0.01, for each share they held as of the record date. All common stock share and per share data for all periods presented in the accompanying consolidated financial statements and related notes are presented on a post-split basis.
Common stock, par value | $ / shares						$ 0.01	$ 0.01					$ 0.01
Stock split conversion ratio		2
Number of authorized shares of common stock						80,000,000	80,000,000			80,000,000
Value of shares repurchased by the Company | $						$ 45,227,000	$ 50,000,000	$ 25,000,000
Common stock repurchase program, termination date	Oct. 22, 2015
Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased by the Company						(1,134,300)	(1,657,919)	(1,122,510)
Common stock repurchase program, authorized shares									2,000,000
August 2013 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, authorized amount | $														$ 25,000,000	$ 25,000,000
October 2013 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, authorized amount | $													$ 30,000,000
Number of shares repurchased by the Company					0
Common stock repurchase program, expiration date						Feb. 10, 2014
February 2014 Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, authorized amount | $											$ 50,000,000
Number of shares repurchased by the Company				1,657,919
Value of shares repurchased by the Company | $				$ 50,000,000
Shares repurchased by the Company, Average price per share | $ / shares				$ 30.16
Stock Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased by the Company			1,134,000
Value of shares repurchased by the Company | $			$ 45,200,000
October 2015 Stock Repurchase Program
Equity, Class of Treasury Stock [Line Items]
Number of shares repurchased by the Company						0
Common stock repurchase program, termination date	Dec. 31, 2016
October 2015 Stock Repurchase Program | Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, authorized shares	3,150,000
Scenario, Previously Reported [Member]
Equity, Class of Treasury Stock [Line Items]
Number of authorized shares of common stock										40,000,000