Segment and Related Information - Financial Information by Business Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total revenues	$ 138,792	$ 108,550
Depreciation and amortization	25,502	30,782
Operating income (loss)	(149,069)	(17,893)
Capital expenditures	2,651	9,679
Total assets	719,523	1,007,998	$ 969,912
Canada
Segment Reporting Information [Line Items]
Total revenues	79,348	66,770
Australia
Segment Reporting Information [Line Items]
Total revenues	49,113	28,421
U.S.
Segment Reporting Information [Line Items]
Total revenues	10,331	13,359
Operating segments | Canada
Segment Reporting Information [Line Items]
Total revenues	79,348	66,770
Depreciation and amortization	14,369	16,228
Operating income (loss)	(136,631)	(11,595)
Capital expenditures	610	7,064
Total assets	649,963	825,100
Operating segments | Australia
Segment Reporting Information [Line Items]
Total revenues	49,113	28,421
Depreciation and amortization	9,295	9,757
Operating income (loss)	6,164	(385)
Capital expenditures	463	935
Total assets	242,238	284,574
Operating segments | U.S.
Segment Reporting Information [Line Items]
Total revenues	10,331	13,359
Depreciation and amortization	1,583	3,066
Operating income (loss)	(14,134)	(961)
Capital expenditures	1,372	1,520
Total assets	32,758	59,193
Corporate and eliminations
Segment Reporting Information [Line Items]
Total revenues	0	0
Depreciation and amortization	255	1,731
Operating income (loss)	(4,468)	(4,952)
Capital expenditures	206	160
Total assets	$ (205,436)	$ (160,869)