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Commitments And Contingencies (Narrative) (Details) - USD ($) | 1 Months Ended | 12 Months Ended
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Apr. 30, 2016 | Dec. 31, 2018
Tax Audit/Litigation [Member] |  |
Commitments And Contingencies [Line Items] |  |
Income tax obligation |  | $ 3,000,000
Cotter, Jr. Related Litigation Matters [Member] |  |
Commitments And Contingencies [Line Items] |  |
Settlement awarded |  | 1,550,000
Settlement awarded to the other party |  | 443,000
Arbitration reimbursement from other party |  | 19,250
Separation payment amount |  | $ 313,000
Separation payment interest percent |  | 10.00%
Full amount of separation payment amount |  | $ 86,000
Damages sought |  | 787,769
Legal fees |  | 5,900,000
Litigation expense |  | 3,500,000
Coverage limit |  | $ 10,000,000
The STOMP Arbitration [Member] |  |
Commitments And Contingencies [Line Items] |  |
Settlement awarded | $ 2,300,000 |
Class B [Member] | Cotter Estate [Member] | Cotter, Jr. Related Litigation Matters [Member] |  |
Commitments And Contingencies [Line Items] |  |
Shares held by estate |  | 427,808
Voting stock percent |  | 25.50%
Class B [Member] | Cotter Trust [Member] | Cotter, Jr. Related Litigation Matters [Member] |  |
Commitments And Contingencies [Line Items] |  |
Shares held by estate |  | 696,080
Voting stock percent |  | 41.40%
Class B [Member] | Cotter Voting Trust [Member] | Cotter, Jr. Related Litigation Matters [Member] |  |
Commitments And Contingencies [Line Items] |  |
Shares held by estate |  | 1,123,888
Voting stock percent |  | 66.90%

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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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