Consolidated Statement of Equity Statement - USD ($) shares in Thousands, $ in Thousands	Total	Additional Paid-in Capital [Member]	Common Stock [Member]	Retained Earnings	Treasury Stock, Common
Common Stock, Shares, Issued			54,234
Total Equity	$ 228,374	$ 740,838	$ 542	$ (491,494)
Treasury Stock, Common, Shares					2,188
Treasury Stock, Value	(21,512)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures			540
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	(5)	$ 5
Stock-based compensation expense	1,791	1,791
CostOfRepurchasedSharesForTaxWittholdingForShareBasedCompensation	(612)
Net Income (Loss) Attributable to Parent	(52,707)
Stock Issued During Period, Value, Treasury Stock Reissued	(612)
Stock Issued During Period, Shares, Treasury Stock Reissued					238
Net Income (Loss) Attributable to Parent	(30,563)
Common Stock, Shares, Issued			54,774
Total Equity	176,846	742,624	$ 547	(544,201)
Treasury Stock, Common, Shares					2,426
Treasury Stock, Value	(22,124)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures			357
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	(4)	$ 4
Stock-based compensation expense	1,719	1,719
CostOfRepurchasedSharesForTaxWittholdingForShareBasedCompensation	(245)
Net Income (Loss) Attributable to Parent	22,144
Stock Issued During Period, Value, Treasury Stock Reissued	$ (245)
Stock Issued During Period, Shares, Treasury Stock Reissued					107
Common Stock, Shares, Issued	55,132		55,131
Total Equity	$ 200,464	744,339	$ 551	(522,057)
Treasury Stock, Common, Shares					2,533
Treasury Stock, Value	$ (22,369)
Common Stock, Shares, Issued	55,140		55,140
Total Equity	$ 130,751	745,932	$ 551	(593,356)
Treasury Stock, Common, Shares					2,536
Treasury Stock, Value	(22,376)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures			179
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	(2)	$ 2
Stock-based compensation expense	794	794
CostOfRepurchasedSharesForTaxWittholdingForShareBasedCompensation	(98)
Net Income (Loss) Attributable to Parent	(50,388)
Stock Issued During Period, Value, Treasury Stock Reissued	(98)
Stock Issued During Period, Shares, Treasury Stock Reissued					78
Net Income (Loss) Attributable to Parent	(26,208)
Common Stock, Shares, Issued			55,319
Total Equity	81,059	746,724	$ 553	(643,744)
Treasury Stock, Common, Shares					2,614
Treasury Stock, Value	(22,474)
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures			499
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	0	(5)	$ 5
Stock-based compensation expense	799	799
CostOfRepurchasedSharesForTaxWittholdingForShareBasedCompensation	(74)
Net Income (Loss) Attributable to Parent	24,180
Stock Issued During Period, Value, Treasury Stock Reissued	$ (74)
Stock Issued During Period, Shares, Treasury Stock Reissued					67
Common Stock, Shares, Issued	55,818		55,818
Total Equity	$ 105,964	$ 747,518	$ 558	$ (619,564)
Treasury Stock, Common, Shares					2,681
Treasury Stock, Value	$ (22,548)