CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands, except Share data		Common Stock [Member]	Treasury Stock	Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Total
Balance at Dec. 31, 2013		$ 218,797		$ 53,765	$ (31,771)	$ 197,464	$ 438,255
Balance (in shares) at Dec. 31, 2013		218,797,000
Net Income						137,664	137,664
Pension Liability Adjustment					(25,575)		(25,575)
Foreign Currency Translation Adjustments					(8,142)		(8,142)
Cash Dividends						(75,750)	(75,750)
Common Stock Issued for Acquisitions		585	290	15,831		(292)	16,414
Common Stock Issued for Acquisitions (in shares)		585,000	290,000
Common Stock Purchased	[1]	(920)	(590)	(15,831)		(12,004)	(29,345)
Common Stock Purchased (in shares)	[1]	(920,000)	(590,000)
Three-For-Two Stock Split		(100)	100
Three-For-Two Stock Split (in shares)		(100,000)	100,000
Stock Compensation		439		10,286		(146)	10,579
Stock Compensation (in shares)		439,000
Employee Stock Buybacks and Common Stock Options Exercised		(318)		(5,956)		106	(6,168)
Employee Stock Buybacks and Common Stock Options Exercised (in shares)		(318,000)
Excess Tax Benefit on Restricted Stock, Dividend Compensation and Non-Qualified Stock Options				4,744			4,744
Balance at Dec. 31, 2014		218,483	(200)	62,839	(65,488)	247,042	462,676
Balance (in shares) at Dec. 31, 2014		218,483,000	(200,000)
Net Income						30,281	30,281
Foreign Currency Translation Adjustments					(7,149)		(7,149)
Cash Dividends						(17,483)	(17,483)
Common Stock Purchased		(19)				(416)	(435)
Common Stock Purchased (in shares)		(19,000)					19,000
Stock Compensation		648		2,436		(219)	2,865
Stock Compensation (in shares)		648,000
Employee Stock Buybacks and Common Stock Options Exercised		(271)		(5,875)		90	(6,056)
Employee Stock Buybacks and Common Stock Options Exercised (in shares)		(271,000)
Excess Tax Benefit on Restricted Stock, Dividend Compensation and Non-Qualified Stock Options				2,281			2,281
Balance at Mar. 31, 2015		$ 218,841	$ (200)	$ 61,681	$ (72,637)	$ 259,295	$ 466,980
Balance (in shares) at Mar. 31, 2015		218,841,000	(200,000)

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