Impairment Charges - Narrative (Details) - USD ($)	3 Months Ended					12 Months Ended
	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill, impairment loss	$ 19,900,000
Property, plant and equipment, net	590,309,000					$ 590,309,000	$ 658,905,000
Impairment of long-lived assets held-for-use	702,000	$ 5,546,000	$ 28,661,000	$ 27,244,000	$ 4,360,000
Asset retirement obligation, accretion expense						1,538,000	1,689,000	$ 1,353,000
Asset retirement obligation, current						$ 497,000	6,629,000	$ 86,000
Canada
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill, impairment loss	19,900,000
Impairment of long-lived assets held-for-use	702,000	0	28,661,000	27,244,000	4,360,000
Australia
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill, impairment loss	0
Impairment of long-lived assets held-for-use	0	5,546,000	0	0	0
U.S.
Impaired Long-Lived Assets Held and Used [Line Items]
Goodwill, impairment loss	0
Impairment of long-lived assets held-for-use	$ 0	0	0	0	0
Canadian Lodge In Southern Alberta | Canada
Impaired Long-Lived Assets Held and Used [Line Items]
Property, plant and equipment, net		515,000	$ 0				$ 0
Impairment of long-lived assets held-for-use		4,500,000		$ 27,200,000
Open Camp Assets | Canada
Impaired Long-Lived Assets Held and Used [Line Items]
Property, plant and equipment, net					0
Impairment of long-lived assets held-for-use					3,200,000
Undeveloped Land Positions | Canada
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets held-for-use					$ 1,200,000
Restatement Adjustment | Previously Unrecorded Liability For Asset Retirement Obligation | Australia Village | Australia
Impaired Long-Lived Assets Held and Used [Line Items]
Depreciation and amortization		500,000
Impairment expense		1,000,000
Asset retirement obligation, accretion expense		900,000
Asset retirement obligation, current		$ 2,300,000