CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net earnings	$ 26,986	$ 53,721
Adjustments to arrive at net cash provided by operating activities:
Depreciation and amortization	26,395	25,893
Share-based compensation	2,849	1,330
Loss on assets	48,260	3,073
Deferred income taxes	(6,590)	(222)
Changes in operating assets and liabilities	(28,461)	(13,751)
Net cash provided by operating activities	69,439	70,044
Cash flows from investing activities:
Acquisition of property, plant and equipment	(29,752)	(55,241)
Proceeds from sale of assets	930	31
Other investing activity	(620)	(132)
Net cash used in investing activities	(29,442)	(55,342)
Cash flows from financing activities:
Proceeds from additional borrowings	174,741	75,596
Debt payments	(73,478)	(55,127)
Purchase of treasury stock	(108,753)	0
Dividends paid	(23,809)	(22,507)
Proceeds from options exercised and other equity transactions	396	420
Net cash used in financing activities	(30,903)	(1,618)
Effect of exchange rate changes on cash and cash equivalents	(502)	(1,481)
Net increase in cash and cash equivalents	8,592	11,603
Cash and cash equivalents at beginning of period	19,836	15,062
Cash and cash equivalents at end of period	$ 28,428	$ 26,665