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Share-Based Payment Arrangements (Summary of Option Activity) (Details) - Options [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) $ / shares shares | Dec. 31, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Shares, Outstanding at Beginning | shares | 46,685 |
Number of Shares, Options Converted at Acquisition | shares | 20,530 |
Number of Shares, Exercised/Released | shares | (23,365) |
Number of Shares, Expired | shares | (15,305) |
Number of Shares, Outstanding at Ending | shares | 28,545 | 46,685
Number of Shares, Exercisable at Ending | shares | 28,545 |
Weighted Average Exercise Price, Outstanding at Beginning | $ / shares | $ 31.88 |
Weighted Average Exercise Price, Options Converted at Acquisition | $ / shares | 46.76 |
Weighted Average Exercise Price, Exercised/Released | $ / shares | $ 33.06 |
Weighted Average Exercise Price, Expired | $ / shares | 45.85 |
Weighted Average Exercise Price, Outstanding at Ending | $ / shares | 34.11 | $ 31.88
Weighted Average Exercise Price, Exercisable at Ending | $ / shares | $ 34.11 |
Weighted Average Remaining Contractual Term (Years) | 2 years 2 months 12 days | 2 years 7 months 6 days
Weighted Average Remaining Contractual Term (Years), Exercisable at Ending | 2 years 2 months 12 days |
Aggregate Intrinsic Value, Outstanding at Beginning | $ | $ 164 |
Aggregate Intrinsic Value, Exercised/Released | $ | 180 |
Aggregate Intrinsic Value, Expired | $ | 6 |
Aggregate Intrinsic Value, Outstanding at Ending | $ | 296 | $ 164
Aggregate Intrinsic Value, Exercisable at Ending | $ | $ 296 |

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Options, Expiration In Period, Aggregate Intrinsic Value + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award options subsidiary outstanding weighted average exercise price. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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