CONSOLIDATED STATEMENTS OF SHAREHOLDERS EQUITY (USD $) In Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Balances at Dec. 31, 2011	$ 630,158	$ 231	$ 56,539	$ 577,253	$ (3,865)
Net income	105,933			105,933
Foreign currency translation adjustment, net of tax expense of $1,035 2012, ($710) 2013, $1,756 2014	1,925				1,925
Comprehensive income	107,858
Exercise of stock options	54		54
Tax benefit from stock based compensation	1,388		1,388
Stock granted under restricted stock plan, net	207	1	206
Stock based compensation	4,903		4,903
Shares repurchased and retired	(5,727)	(1)	(5,726)
Shares surrendered by employees to pay taxes	(2,200)			(2,200)
Cash dividends ($1.02 per share)	(23,563)			(23,563)
Balances at Dec. 31, 2012	713,078	231	57,364	657,423	(1,940)
Net income	84,886			84,886
Foreign currency translation adjustment, net of tax expense of $1,035 2012, ($710) 2013, $1,756 2014	(1,321)				(1,321)
Comprehensive income	83,565
Tax benefit from stock based compensation	(205)		(205)
Stock granted under restricted stock plan, net	210	1	209
Stock based compensation	5,247		5,247
Shares repurchased and retired	(5,834)	(1)	(5,833)
Shares surrendered by employees to pay taxes	(1,124)			(1,124)
Cash dividends ($1.02 per share)	(26,350)			(26,350)
Balances at Dec. 31, 2013	768,587	231	56,782	714,835	(3,261)
Net income	55,588			55,588
Foreign currency translation adjustment, net of tax expense of $1,035 2012, ($710) 2013, $1,756 2014	(19,708)				(19,708)
Comprehensive income	35,880
Tax benefit from stock based compensation	303		303
Stock granted under restricted stock plan, net	700	1	699
Stock based compensation	6,688		6,688
Shares repurchased and retired	(5,176)	(1)	(5,175)
Shares surrendered by employees to pay taxes	(1,804)			(1,804)
Cash dividends ($1.02 per share)	(29,121)			(29,121)
Balances at Dec. 31, 2014	$ 776,057	$ 231	$ 59,297	$ 739,498	$ (22,969)