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Stock Compensation Plans (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 06, 2017 | May 25, 2017 | May 16, 2017 | Dec. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Mar. 08, 2019 | Jun. 07, 2017 | Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock-based compensation |  |  |  |  | $ 3,170 | $ 7,266 |  |  |
Options outstanding |  |  |  | 0 | 0 |  |  |  |
Stock bonus plan shares authorized |  |  |  |  |  |  |  |  | 250,000
Shares available in stock bonus plan |  |  |  | 86,383 | 86,383 |  |  |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share price (in dollars per share) |  |  |  |  |  |  | $ 5.16 |  |
Restricted stock units expected to vest or lapse within twelve months |  |  |  | 1,900,000 | 1,900,000 |  |  |  |
Restricted stock units expected to vest or lapse in year two |  |  |  | 1,200,000 | 1,200,000 |  |  |  |
Restricted stock units expected to vest or lapse in year three |  |  |  | 1,100,000 | 1,100,000 |  |  |  |
Value of units vested in the period |  |  |  |  | $ 2,100 | $ 7,100 |  |  |
Stock bonus plan shares authorized |  |  |  | 4,850,000 | 4,850,000 |  |  |  |
Shares available in stock bonus plan |  |  |  | 1,258,466 | 1,258,466 |  |  |  |
Restricted Stock Units (RSUs) [Member] | Compensation Committee Plan for Chairman, President, and Chief Financial Officer [Member] | Chairman, President, and Chief Financial Officer [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Stock issued during period, shares |  |  | 495,000 |  |  |  |  |  |
Share price (in dollars per share) |  |  | $ 7.74 |  |  |  |  |  |
Allocated share-based compensation expense |  |  | $ 3,800 |  |  |  |  |  |
Restricted Stock Units (RSUs) [Member] | Restricted Stock Unit Plan [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Additional shares authorized for RSU plan |  | 1,000,000 |  |  |  |  |  |  |
Share-based compensation plan expiration date |  |  |  |  | May 25, 2027 |  |  |  |
Restricted Stock Units (RSUs) [Member] | Four-Year Compensation Plan [Member] | Chairman, President, and Chief Financial Officer [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share price (in dollars per share) |  |  |  |  |  |  |  | $ 8.23 |
Share-based compensation plan expiration date |  |  |  | Dec. 16, 2021 |  |  |  |  |
RSUs granted in period | 645,000 |  |  |  |  |  |  |  |
Annual percentage vested |  |  |  |  | 25.00% |  |  |  |
Subsequent Event [Member] | Restricted Stock Units (RSUs) [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Units outstanding value |  |  |  |  |  |  | $ 4,070 |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Net number of non-option equity instruments granted to participants. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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