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Income Taxes (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
Unrecognized tax benefits that would affect the effective tax rate | $ 11,500,000 | $ 9,100,000 | $ 6,900,000
Balance at beginning of period | 11,064,000 | 10,512,000 | 9,998,000
Increases related to prior year tax positions | 4,374,000 | 490,000 | 858,000
Decreases related to prior year tax positions | (5,423,000) | (1,093,000) | (2,895,000)
Increases related to current year tax positions | 4,991,000 | 1,818,000 | 2,714,000
Expiration of statute of limitations | (1,064,000) | (982,000) | (163,000)
Balance at end of period | $ 12,478,000 | $ 11,064,000 | $ 10,512,000

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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(4) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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