CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss	Total
Balances at Dec. 31, 2013					$ (14,912)
Increase (Decrease) in Stockholders' Equity
Net income						$ 31,633
Other comprehensive loss, net of tax					(3,788)	(3,788)
Balances at Sep. 30, 2014					(18,700)
Balances at Dec. 31, 2014	$ 277	$ 303,045	$ 338,810	$ (57,770)	(23,479)	560,883
Balances (in shares) at Dec. 31, 2014	27,722			1,678
Increase (Decrease) in Stockholders' Equity
Net income			39,866			39,866
Other comprehensive loss, net of tax					(4,106)	(4,106)
Issuance of common stock under share-based compensation plans	$ 2	(2)
Issuance of common stock under share-based compensation plans (in shares)	210
Tax effect of share-based compensation plans		(1,447)				(1,447)
Share-based compensation expense		6,343				6,343
Purchase of treasury stock				$ (10,004)		(10,004)
Purchase of treasury stock (in shares)				292
Dividends declared on common stock			(4,740)			(4,740)
Balances at Sep. 30, 2015	$ 279	$ 307,939	$ 373,936	$ (67,774)	$ (27,585)	$ 586,795
Balances (in shares) at Sep. 30, 2015	27,932			1,970