CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Common Stock	Treasury	Paid-in Capital	Total	Retained Earnings
Balance at Dec. 31, 2014		$ 462,676	$ 218,483	$ (200)	$ 62,839	$ (65,488)	$ 247,042
Balance (in shares) at Dec. 31, 2014			218,483	200
Net Income		152,149					152,149
Other Comprehensive Income, Net of Tax
Pension Liability Adjustment		9,070				9,070
Foreign Currency Translation Adjustments		(14,760)				(14,760)
Cash Dividends		(91,755)					(91,755)
Common Stock Purchased		(435)	$ (19)		0		(416)
Common Stock Purchased (in shares)			(19)
Stock Compensation		12,110	$ 597		11,731		(218)
Stock Compensation (in shares)			597
Employee Stock Buybacks		(6,972)	$ (308)		(6,754)		90
Employee Stock Buybacks (in shares)			308
Excess Tax Benefit on Share-based payments		1,946			1,946
Balance at Dec. 31, 2015		524,029	$ 218,753	$ (200)	69,762	(71,178)	306,892
Balance (in shares) at Dec. 31, 2015			218,753	200
Net Income		167,369					167,369
Other Comprehensive Income, Net of Tax
Pension Liability Adjustment		1,705				1,705
Foreign Currency Translation Adjustments		(602)				(602)
Cash Dividends		(109,002)					(109,002)
Common Stock Purchased	[1]	(22,719)	$ (836)				(21,883)
Common Stock Purchased (in shares)	[1]		(836)
Common Stock Retired			$ (200)	$ 200
Common Stock Retired (in shares)			200	200
Stock Compensation		12,415	$ 388		12,027
Stock Compensation (in shares)			388
Employee Stock Buybacks		(8,349)	$ (313)		(8,036)
Employee Stock Buybacks (in shares)			(313)
Excess Tax Benefit on Share-based payments		3,699			3,699
Balance at Dec. 31, 2016		568,545	$ 217,792	$ 0	77,452	(70,075)	343,376
Balance (in shares) at Dec. 31, 2016			217,792	0
Net Income		179,124					179,124
Other Comprehensive Income, Net of Tax
Pension Liability Adjustment		14,159				14,159
Foreign Currency Translation Adjustments		9,960				9,960
Cash Dividends		(122,017)					(122,017)
Stock Compensation		12,399	$ 434		11,965
Stock Compensation (in shares)			434
Employee Stock Buybacks		(8,246)	$ (234)		(8,012)
Employee Stock Buybacks (in shares)			(234)
Balance at Dec. 31, 2017		$ 653,924	$ 217,992	$ 0	$ 81,405	$ (45,956)	$ 400,483
Balance (in shares) at Dec. 31, 2017			217,992	0

[1] Charges to Retained Earnings are from purchases of the Company’s Common Stock.