Accounting Policies - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended		3 Months Ended			6 Months Ended
	May 27, 2014	Apr. 01, 2014	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	May 20, 2014	Apr. 01, 2014	Dec. 31, 2013
Accounting Policies [Line Items]
Stockholders' equity, stock split description						The Company's Board of Directors approved a two-for-one stock split of the Company's common stock, effected in the form of a stock dividend. On April 1, 2014, each stockholder of record at the close of business on March 20, 2014 (the "Record Date") received as a dividend, one additional share of common stock, par value $.01, for each share of common stock held on the Record Date.
Common stock split, conversion ratio		2				2
Common stock par value										$ 0.01
Number of additional shares issued for each shares held on record date		1
Common stock, shares authorized			200,000,000	100,000,000		200,000,000			200,000,000		200,000,000
Cash dividends declared per share	$ 0.030		$ 0.030	$ 0.015	$ 0.015	$ 0.045		$ 0.030
Purchase price adjustment against goodwill						$ 2,866	[1]
Antenna
Accounting Policies [Line Items]
Purchase price adjustment against goodwill			$ 3,500	$ 600

[1] The purchase price adjustments identified during the first six months of 2014 have been retroactively applied as of December 31, 2013.