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Share Based Payments (Schedule of Outstanding Units Activity) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2018 USD ($) item | Dec. 31, 2017 USD ($) item
Deferred Share Units [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Outstanding, other than options, beginning | 974,176 | 883,068
Granted, other units | 101,612 | 91,108
Paid, other units | (225,724) |
Outstanding, other than options, ending | 850,064 | 974,176
Outstanding, beginning balance, fair value | $ 5,094,000 | $ 4,992,000
Fair Value, granted, other units | 482,000 | 429,000
Outstanding, ending balance, fair value | 3,116,000 | 5,094,000
Fair Value, Paid in Cash, other units | (1,251,000) |
Change in fair value, other units | $ (1,209,000) | $ (327,000)
Restricted Share Units [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Granted, other units | 422,030 |
Cash Settled, Restricted Share Units [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Outstanding, other than options, beginning | 980,476 | 1,337,720
Paid, other units | (405,821) | (406,022)
Forfeited or cancelled, other units | (3,029) | (5,007)
Outstanding, other than options, ending | 659,385 | 980,476
Outstanding, beginning balance, fair value | $ 3,935,000 | $ 4,489,000
Fair value, forfeited or cancelled, other units | (15,000) | (5,000)
Outstanding, ending balance, fair value | 2,057,000 | 3,935,000
Fair value, Current portion | 1,932,000 |
Fair value, Non-current portion | 125,000 |
Fair Value, Paid in Cash, other units | (1,915,000) | (2,114,000)
Change in fair value, other units | $ (362,000) | $ 1,310,000
Cash Settled, Restricted Share Units [Member] | Officers [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Granted, other units | 16,129 | 15,748
Fair Value, granted, other units | $ 76,000 | $ 74,000
Cash Settled, Restricted Share Units [Member] | Employee [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Granted, other units | 71,630 | 38,037
Fair Value, granted, other units | $ 338,000 | $ 181,000
Equity Settled, Restricted Share Units [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Outstanding, other than options, beginning | 390,751 |
Paid, other units | (78,150) |
Outstanding, other than options, ending | 734,631 | 390,751
Equity Settled, Restricted Share Units [Member] | Officers [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Granted, other units | 417,135 | 390,751
Equity Settled, Restricted Share Units [Member] | Employee [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Granted, other units | 4,895 |
Performance Share Units [member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Granted, other units | 1,002,166 |
Cash Settled, Performance Share Units [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Outstanding, other than options, beginning | item | 553,459 | 885,535
Paid, other units | item | (553,459) | (332,076)
Outstanding, other than options, ending | item |  | 553,459
Outstanding, beginning balance, fair value | $ 2,691,000 | $ 3,545,000
Outstanding, ending balance, fair value |  | 2,691,000
Fair Value, Paid in Cash, other units | (2,596,000) | (1,770,000)
Fair value increase (decrease), other units |  | $ (916,000)
Change in fair value, other units | $ (95,000) |
Equity Settled, Performance Share Units [Member] |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Granted, other units | item | 1,002,166 |
Outstanding, other than options, ending | item | 1,002,166 |

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