Consolidated Statements of Stockholders' Equity (USD $) In Thousands		Total	Common Stock		Paid-in Capital	Retained Earnings
Balance at Dec. 31, 2013		$ 164,106	$ 221	[1]	$ 0	$ 163,885	[1]
Balance (in shares) at Dec. 31, 2013	[1]		55,067
Net income		21,185				21,185	[1]
Stock options exercised and restricted stock awards vested, including tax benefits		1,312	0	[1]	1,312
Stock options exercised and restricted stock awards vested, including tax benefits (in shares)	[1]		242
Share-based compensation		984			984
Stock repurchased and retired		(5,116)	(1)	[1]	(2,296)	(2,819)	[1]
Stock repurchased and retired (in shares)	[1]		(260)
Dividends		4,779				4,779	[1]
Balance at Jun. 30, 2014		$ 177,692	$ 220	[1]	$ 0	$ 177,472	[1]
Balance (in shares) at Jun. 30, 2014	[1]		55,049

[1] Reflects three-for-two stock split effective July 16, 2014