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Income Taxes - Operating Loss Carryforward Expirations (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($)
Operating Loss Carryforwards [Line Items]
Total	$ (75,353)
Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(46,980)
Capital loss carryforwards	53,883
U.S.
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	2,395
Expiring net operating loss carryforwards	(20,770)
Mexico
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(7,508)
Barbados
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(95)
Australia
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	46,600
Tax Year 2021
Operating Loss Carryforwards [Line Items]
Total	(20)
Tax Year 2021 | Barbados
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(20)
Tax Year 2022
Operating Loss Carryforwards [Line Items]
Total	(6,215)
Tax Year 2022 | Mexico
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(6,184)
Tax Year 2022 | Barbados
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(31)
Tax Year 2023
Operating Loss Carryforwards [Line Items]
Total	(369)
Tax Year 2023 | Mexico
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(347)
Tax Year 2023 | Barbados
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(22)
Tax Year 2024
Operating Loss Carryforwards [Line Items]
Total	(4)
Tax Year 2024 | Barbados
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(4)
Tax Year 2025
Operating Loss Carryforwards [Line Items]
Total	(80)
Tax Year 2025 | Mexico
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(74)
Tax Year 2025 | Barbados
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(6)
Tax Year 2026
Operating Loss Carryforwards [Line Items]
Total	(1,730)
Tax Year 2026 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(1,027)
Tax Year 2026 | Mexico
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(697)
Tax Year 2026 | Barbados
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(6)
Tax Year 2027
Operating Loss Carryforwards [Line Items]
Total	(853)
Tax Year 2027 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(847)
Tax Year 2027 | Barbados
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(6)
Tax Year 2028
Operating Loss Carryforwards [Line Items]
Total	(6,738)
Tax Year 2028 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(5,245)
Tax Year 2028 | U.S.
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(1,287)
Tax Year 2028 | Mexico
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(206)
Tax Year 2029
Operating Loss Carryforwards [Line Items]
Total	(5,741)
Tax Year 2029 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(4,022)
Tax Year 2029 | U.S.
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(1,719)
Tax Year 2030
Operating Loss Carryforwards [Line Items]
Total	(7,002)
Tax Year 2030 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(5,032)
Tax Year 2030 | U.S.
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(1,970)
Tax Year 2031
Operating Loss Carryforwards [Line Items]
Total	(5,633)
Tax Year 2031 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(3,806)
Tax Year 2031 | U.S.
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(1,827)
Tax Year 2032
Operating Loss Carryforwards [Line Items]
Total	(9,804)
Tax Year 2032 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(6,397)
Tax Year 2032 | U.S.
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(3,407)
Tax Year 2033
Operating Loss Carryforwards [Line Items]
Total	(8,399)
Tax Year 2033 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(6,076)
Tax Year 2033 | U.S.
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(2,323)
Tax Year 2034
Operating Loss Carryforwards [Line Items]
Total	(7,518)
Tax Year 2034 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(4,420)
Tax Year 2034 | U.S.
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(3,098)
Tax year 2035
Operating Loss Carryforwards [Line Items]
Total	(3,731)
Tax year 2035 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(3,729)
Tax year 2035 | U.S.
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(2)
Tax Year 2036
Operating Loss Carryforwards [Line Items]
Total	(5,454)
Tax Year 2036 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(2,799)
Tax Year 2036 | U.S.
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(2,655)
Tax Year 2037
Operating Loss Carryforwards [Line Items]
Total	(4,398)
Tax Year 2037 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	(1,916)
Tax Year 2037 | U.S.
Operating Loss Carryforwards [Line Items]
Expiring net operating loss carryforwards	(2,482)
Tax Year 2038
Operating Loss Carryforwards [Line Items]
Total	(1,664)
Tax Year 2038 | Canada
Operating Loss Carryforwards [Line Items]
Expiring noncapital loss carryforwards	$ (1,664)

X

- Definition

Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
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