CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net earnings	$ 21,439	$ 28,906
Adjustments to arrive at net cash provided by operating activities:
Depreciation and amortization	12,963	12,037
Share-based compensation	640	1,201
Loss (gain) on assets	2,380	(29)
Deferred income taxes	1,804	(191)
Changes in operating assets and liabilities	(13,637)	(32,946)
Net cash provided by operating activities	25,589	8,978
Cash flows from investing activities:
Acquisition of property, plant and equipment	(21,039)	(16,939)
Proceeds from sale of assets	24	32
Other investing activity	(70)	(94)
Net cash used in investing activities	(21,085)	(17,001)
Cash flows from financing activities:
Proceeds from additional borrowings	33,438	31,364
Debt payments	(23,954)	(11,613)
Purchase of treasury stock	0	(15,360)
Dividends paid	(10,999)	(10,561)
Proceeds from options exercised and other equity transactions	56	272
Net cash used in financing activities	(1,459)	(5,898)
Effect of exchange rate changes on cash and cash equivalents	1,363	4,415
Net increase (decrease) in cash and cash equivalents	4,408	(9,506)
Cash and cash equivalents at beginning of period	15,062	22,855
Cash and cash equivalents at end of period	$ 19,470	$ 13,349