Label	Element	Value
Stock Issued During Period, Value, Stock Options Exercised	us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised	$ 3,635,000
Stock Issued During Period, Value, Stock Options Exercised	us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised	1,193,000
Stock Repurchased During Period, Value	us-gaap_StockRepurchasedDuringPeriodValue	75,000,000
Stock Issued During Period, Value, Employee Stock Purchase Plan	us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1,830,000
Stock Issued During Period, Value, Employee Stock Purchase Plan	us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	2,144,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6,167,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4,730,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0
Retained Earnings [Member]
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	161,418,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	99,418,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	89,039,000
Stock Repurchased During Period, Value	us-gaap_StockRepurchasedDuringPeriodValue	53,521,000
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	10,527,000
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	(8,479,000)
Additional Paid-in Capital [Member]
Stock Issued During Period, Value, Stock Options Exercised	us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised	3,634,000
Stock Issued During Period, Value, Stock Options Exercised	us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised	1,192,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	525,038,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	536,320,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	562,729,000
Stock Repurchased During Period, Value	us-gaap_StockRepurchasedDuringPeriodValue	21,473,000
Stock Issued During Period, Value, Employee Stock Purchase Plan	us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1,830,000
Stock Issued During Period, Value, Employee Stock Purchase Plan	us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	2,144,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6,167,000
APIC, Share-based Payment Arrangement, Increase for Cost Recognition	us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	4,730,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	(3,000)
Common Stock [Member]
Stock Issued During Period, Value, Stock Options Exercised	us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised	1,000
Stock Issued During Period, Value, Stock Options Exercised	us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised	1,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	507,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	510,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	508,000
Stock Repurchased During Period, Value	us-gaap_StockRepurchasedDuringPeriodValue	6,000
Stock Issued During Period, Value, Employee Stock Purchase Plan	us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	$ 0
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	257,000
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures	us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	298,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised	85,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised	28,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans	us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	25,000
Stock Issued During Period, Shares, Employee Stock Purchase Plans	us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	22,000
Stock Repurchased During Period, Shares	us-gaap_StockRepurchasedDuringPeriodShares	616,000
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures	us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	$ 3,000
Shares, Issued	us-gaap_SharesIssued	50,671,000
Shares, Issued	us-gaap_SharesIssued	51,020,000
Shares, Issued	us-gaap_SharesIssued	50,771,000
AOCI Attributable to Parent [Member]
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	$ (33,998,000)
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	(30,380,000)
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	(43,706,000)
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	(3,618,000)
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	$ 1,429,000