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, 2010	$ 521,979	$ 231	$ 57,475	$ 468,387	$ (4,114)
Net income	130,136			130,136
Foreign currency translation adjustment, net of tax expense (benefit) of ($710) in 2013, $1,035 in 2012 and ($1,447) in 2011	249				249
Comprehensive income	130,385
Exercise of stock options	76		76
Tax benefit (expense) from stock based compensation	1,412		1,412
Stock granted under restricted stock plan, net	223		223
Stock based compensation	4,002		4,002
Shares repurchased and retired	(6,649)		(6,649)
Shares surrendered by employees to pay taxes	(901)			(901)
Cash dividends, per share $1.14 in 2013 , $1.02 in 2012 and $0.88 in 2011	(20,369)			(20,369)
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 (benefit) of ($710) in 2013, $1,035 in 2012 and ($1,447) in 2011	1,925				1,925
Comprehensive income	107,858
Exercise of stock options	54		54
Tax benefit (expense) 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, per share $1.14 in 2013 , $1.02 in 2012 and $0.88 in 2011	(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 (benefit) of ($710) in 2013, $1,035 in 2012 and ($1,447) in 2011	(1,321)				(1,321)
Comprehensive income	83,565
Tax benefit (expense) 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, per share $1.14 in 2013 , $1.02 in 2012 and $0.88 in 2011	(26,350)			(26,350)
Balances at Dec. 31, 2013	$ 768,587	$ 231	$ 56,782	$ 714,835	$ (3,261)