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Commitments And Contingencies (Narrative) (Details) - James J. Cotter, Jr., Derivative Litigation [Member] - USD ($) | 3 Months Ended | 12 Months Ended
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Mar. 31, 2019 | Dec. 31, 2018
Commitments And Contingencies [Line Items] |  |
Settlement awarded | $ 1,550,000 |
Legal fees | 5,900,000 |
Litigation expense | 387,000 | $ 3,500,000
Coverage limit | $ 10,000,000 |

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- Definition Commitments And Contingencies [Line Items] + References No definition available. + Details
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- Definition Insurance, Coverage Limit + References No definition available. + Details
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- Definition The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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- Definition Amount awarded from other party in judgment or settlement of litigation. + References No definition available. + Details
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- Definition Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees. + References No definition available. + Details
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- Details
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