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Commitments And Contingencies (Narrative) (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2016 USD ($) | Mar. 31, 2017 NZD | Mar. 31, 2017 USD ($) | Dec. 31, 2016 NZD | Dec. 31, 2016 USD ($) | Aug. 03, 2016 shares | May 31, 2016 shares
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Total debt of unconsolidated joint ventures and entities |  | NZD 1,500,000 | $ 1,100,000 | NZD 1,500,000 | $ 1,000,000 |  |
Share of unconsolidated debt, based on ownership percentage | NZD |  | 500,000 |  | 500,000 |  |  |
Accrued debt |  | NZD 500,000 | 350,000 | NZD 500,000 | $ 348,000 |  |
Derivative Litigation And James J. Cotter, Jr. Employment Arbitration [Member] |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Amount of damages claimed by plaintiff |  |  | 1,200,000 |  |  |  |
Litigation expense |  |  | 645,000 |  |  |  |
Coverage limit |  |  | 10,000,000 |  |  |  |
The STOMP Arbitration [Member] |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Settlement awarded | $ 2,300,000 |  |  |  |  |  |
Litigation interest percent | 4.00% |  |  |  |  |  |
Litigation payment received |  |  | $ 475,000 |  |  |  |
Litigation final payment date |  | June 2019 | June 2019 |  |  |  |
Class B [Member] | Derivative Litigation And James J. Cotter, Jr. Employment Arbitration [Member] |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Shares held by estate | shares |  |  |  |  |  | 100,000 |
Class B [Member] | Cotter Estate [Member] | Derivative Litigation And James J. Cotter, Jr. Employment Arbitration [Member] |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Shares held by estate | shares |  |  |  |  |  |  | 327,808
Class B [Member] | Cotter Trust [Member] | Derivative Litigation And James J. Cotter, Jr. Employment Arbitration [Member] |  |  |  |  |  |  |
Commitments And Contingencies [Line Items] |  |  |  |  |  |  |
Shares held by estate | shares |  |  |  |  |  |  | 696,080

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