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Fair Value Measurements (Changes in Fair Value of Level 3 Assets and Liabilities) (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Contingent Payments |  |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | $ 2,813,000 | $ 3,348,000 | $ 2,887,000 | $ 3,038,000
Included in Earnings | 58,000 | 73,000 | 120,000 | 202,000
Included in Other Comprehensive Income (Loss) | 0 | 0 | 0 | 0
Transfers, Net | (64,000) | 7,000 | 18,000 | 398,000
Settlements | 230,000 | 224,000 | 448,000 | 434,000
Ending Balance | (2,577,000) | (3,204,000) | (2,577,000) | (3,204,000)
Investment Available for Sale |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning Balance | 16,454,000 | 17,865,000 | 17,752,000 | 17,259,000
Included in Earnings | (36,000) | (34,000) | (72,000) | (69,000)
Included in Other Comprehensive Income (Loss) | 424,000 | 3,000 | 1,758,000 | (568,000)
Transfers, Net | 0 | 0 | 0 | 0
Ending Balance | 15,591,000 | 17,456,000 | 15,591,000 | 17,456,000
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Settlements | $ (475,000) | $ (440,000) | $ (475,000) | $ (440,000)

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
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- Definition Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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