Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities
Net income	$ 60,108	$ 37,726
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	16,487	13,330
Deferred income taxes	2,905	761
Excess tax benefits from stock based compensation	(1,270)	(639)
Loss on disposal or impairment of assets	1,649	11
Foreign currency transaction loss (gain), net	314	(13)
Stock compensation expense	2,795	1,896
Changes in operating assets and liabilities:
Trade accounts and other receivables	(14,291)	(7,755)
Inventories	(13,293)	2,426
Prepaid expenses and other current assets	(2,242)	(1,153)
Long-term prepaid expenses	447	(14)
Accounts payable	(2,583)	9,834
Accrued expenses	2,689	309
Accrued income taxes, net	(1,576)	(2,863)
Net cash provided by operating activities	52,139	53,856
Investing activities
Capital expenditures	(37,468)	(36,294)
Acquisition of BBL Falcon Industries, Ltd.		193
Purchase of short-term investment		(4,989)
Net cash used in investing activities	(37,468)	(41,090)
Financing activities
Net proceeds from stock based compensation	76	194
Dividends paid	(9,264)	(8,326)
Purchase of common stock	(814)	(1,858)
Excess tax benefits from stock based compensation	1,270	639
Net cash used in financing activities	(8,732)	(9,351)
Effect of exchange rate changes on cash	655	(326)
Net increase in cash and cash equivalents	6,594	3,089
Cash and cash equivalents at beginning of period	46,656	69,557
Cash and cash equivalents at end of period	53,250	72,646
Supplemental cash flow information
Interest paid
Income taxes paid	$ 30,611	$ 21,839