CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Total	Common Stock	Retained Earnings	Cost of Common Stock in Treasury	Accumulated Other Comprehensive Income (Loss), Net
Balance at Dec. 31, 2013		$ 585,378	$ 346,535	$ 261,626	$ (29,364)	$ 6,581
Increase (Decrease) in Shareholders' Equity
Net income		28,126		28,126
Other comprehensive income (loss)		3,630				3,630
Issuance of 102,257 and 71,749 common shares under stock based compensation awards, including related tax effects for the six months ended on June 30, 2015 and 2014, respectively		1,440		(276)	1,716
Cost of 149,844 and 524,858 shares of common stock acquired for treasury for the six months ended on June 30, 2015 and 2014, respectively		(15,797)			(15,797)
Common stock dividend ($0.327 and $0.318 per share for the six months ended on June 30, 2015 and 2014, respectively)		(8,559)		(8,559)
Balance at Jun. 30, 2014		594,218	346,535	280,917	(43,445)	10,211
Balance at Dec. 31, 2014		614,473	346,535	302,242	(43,711)	9,407
Increase (Decrease) in Shareholders' Equity
Net income		29,141		29,141
Other comprehensive income (loss)		(1,115)				(1,115)
Issuance of 102,257 and 71,749 common shares under stock based compensation awards, including related tax effects for the six months ended on June 30, 2015 and 2014, respectively		2,446		(237)	2,683
Cost of 149,844 and 524,858 shares of common stock acquired for treasury for the six months ended on June 30, 2015 and 2014, respectively		(4,678)			(4,678)
Common stock dividend ($0.327 and $0.318 per share for the six months ended on June 30, 2015 and 2014, respectively)	[1]	(8,636)		(8,636)
10% common stock dividend		0	90,003	(90,003)
Balance at Jun. 30, 2015		$ 631,631	$ 436,538	$ 232,507	$ (45,706)	$ 8,292

[1] *Per share data gives retrospective recognition to a 10% stock dividend declared on July 22, 2015.