Label	Element	Value
AOCI Attributable to Parent [Member]
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	$ (361,000)
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	(83,000)
Additional Paid-in Capital [Member]
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	468,806,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	$ 486,406,000
Common Stock [Member]
Shares, Issued	us-gaap_SharesIssued	116,949,000
Shares, Issued	us-gaap_SharesIssued	127,471,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	$ 1,275,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	$ 1,169,000
Treasury Stock [Member]
Shares, Issued	us-gaap_SharesIssued	41,297,000
Shares, Issued	us-gaap_SharesIssued	29,114,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	$ (413,465,000)
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	(494,395,000)
Retained Earnings [Member]
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	594,795,000
Stockholders' Equity Attributable to Parent	us-gaap_StockholdersEquity	585,858,000
Accounting Standards Update 2016-02 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(1,287,000)
Accounting Standards Update 2016-02 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(1,287,000)
Adjustments for New Accounting Pronouncement [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(5,054,000)
Adjustments for New Accounting Pronouncement [Member] | AOCI Attributable to Parent [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	(39,000)
Adjustments for New Accounting Pronouncement [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ (5,015,000)