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Consolidated Statements of Stockholders' Equity Statement - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Common Stock
Stock Offering
Additional Paid-in Capital
AOCI Attributable to Parent
Retained Earnings
Treasury Stock
Parent
Common Stock, Shares, Outstanding   16,303            
Stockholders' Equity Attributable to Parent $ 883,551     $ 289,933 $ 98 $ 1,211,076 $ (617,579)  
Common stock, par value $0.001   $ 23            
StockIssuedDuringPeriodSharesStockOptionsSARsExercised   113            
APIC, Share-based Payment Arrangement, Increase for Cost Recognition       19,743       $ 19,743
Proceeds from issuance of common stock 0              
Treasury Stock, Shares, Acquired   217            
Treasury Stock, Value, Acquired, Cost Method             (33,773) (33,773)
Stock Issued During Period, Value, Employee Stock Purchase Plan             3,234 3,234
Stock Issued During Period, Shares, Employee Stock Purchase Plans   41            
Payments of Dividends $ 11,361         (11,361)   (11,361)
Other Comprehensive Income (Loss), Net of Tax 327       327     327
Adjustments to Additional Paid in Capital, Warrant Issued       952       952
Net income (loss)           (126,113)   (126,113)
Common Stock, Shares, Outstanding   16,199            
Stockholders' Equity Attributable to Parent 809,902     295,267 (624) 1,166,588 (651,352)  
Common stock, par value $0.001   $ 23            
APIC, Share-based Payment Arrangement, Increase for Cost Recognition       14,409       14,409
Stock Issued During Period, Shares, Employee Stock Purchase Plans   41            
Payments of Dividends           117   117
Other Comprehensive Income (Loss), Net of Tax 1,049       1,049     1,049
Adjustments to Additional Paid in Capital, Warrant Issued       952       952
Net income (loss)           (93,103)   (93,103)
Common Stock, Shares, Outstanding   16,240            
Stockholders' Equity Attributable to Parent 736,560     310,628 425 1,073,602 (648,118)  
Common stock, par value $0.001   $ 23            
Common Stock, Shares, Outstanding   16,405            
Stockholders' Equity Attributable to Parent 699,363     329,753 (27) 1,015,622 (646,008)  
Common stock, par value $0.001 $ 23 $ 23            
StockIssuedDuringPeriodSharesStockOptionsSARsExercised   12            
APIC, Share-based Payment Arrangement, Increase for Cost Recognition       $ 6,898       $ 6,898
Proceeds from issuance of common stock 335,137 2 1,553 335,137       335,139
Stock Issued During Period, Value, Employee Stock Purchase Plan             3,831 $ 3,831
Stock Issued During Period, Shares, Employee Stock Purchase Plans   16            
Payments of Dividends $ 0              
Other Comprehensive Income (Loss), Net of Tax (98)       (98)     (98)
Adjustments to Additional Paid in Capital, Warrant Issued       $ 105       105
Net income (loss)           101,896   101,896
Common Stock, Shares, Outstanding   16,416            
Stockholders' Equity Attributable to Parent 709,654     333,147 1 1,022,491 (646,008)  
Common stock, par value $0.001   $ 23            
StockIssuedDuringPeriodSharesStockOptionsSARsExercised   1            
APIC, Share-based Payment Arrangement, Increase for Cost Recognition       $ 3,504       $ 3,504
Proceeds from issuance of common stock   2 1,553 335,137       335,139
Stock Issued During Period, Value, Employee Stock Purchase Plan             3,831 $ 3,831
Stock Issued During Period, Shares, Employee Stock Purchase Plans   16            
Other Comprehensive Income (Loss), Net of Tax (126)       (126)     (126)
Adjustments to Additional Paid in Capital, Warrant Issued       $ 105       105
Net income (loss)           95,027   $ 95,027
Common Stock, Shares, Outstanding   17,986            
Stockholders' Equity Attributable to Parent 1,147,134     $ 671,893 $ (125) $ 1,117,518 $ (642,177)  
Common stock, par value $0.001 $ 25 $ 25