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Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Of Property Plant And Equipment [Abstract]

Schedule of Property, Plant and Equipment

		2020				2019
Cost		$	6,563,206			$	6,670,979
Accumulated depreciation			(4,090,523	)			(3,921,516	)
		$	2,472,683			$	2,749,463
Rig equipment			2,269,794				2,510,505
Rental equipment			27,359				34,437
Other equipment			27,318				38,604
Vehicles			4,978				7,796
Buildings			49,451				56,834
Assets under construction			60,572				67,740
Land			33,211				33,547
		$	2,472,683			$	2,749,463

Cost

		Rig Equipment				Rental Equipment				Other Equipment				Vehicles				Buildings				Assets Under Construction				Land				Total
Balance, December 31, 2018		$	6,322,536			$	130,463			$	191,290			$	45,456			$	128,327			$	84,561			$	34,429			$	6,937,062
Additions			18,436				—				976				224				415				139,835				—				159,886
Disposals			(69,945	)			(19,982	)			(4,708	)			(6,014	)			(58	)			—				—				(100,707	)
Reclassifications			150,674				—				1,197				—				—				(151,871	)			—				—
Asset decommissioning			(4,364	)			—				—				—				—				—				—				(4,364	)
Effect of foreign currency exchange differences			(307,954	)			(174	)			(3,436	)			(1,160	)			(2,507	)			(4,785	)			(882	)			(320,898	)
Balance, December 31, 2019			6,109,383				110,307				185,319				38,506				126,177				67,740				33,547				6,670,979
Additions			10,375				—				350				—				—				50,810				—				61,535
Disposals			(78,028	)			(4,664	)			(3,990	)			(2,789	)			(3,053	)			—				—				(92,524	)
Reclassifications			55,322				—				521				—				—				(55,843	)			—				—
Effect of foreign currency exchange differences			(71,285	)			(619	)			(1,196	)			(367	)			(846	)			(2,135	)			(336	)			(76,784	)
Balance, December 31, 2020		$	6,025,767			$	105,024			$	181,004			$	35,350			$	122,278			$	60,572			$	33,211			$	6,563,206

Accumulated Depreciation

		Rig Equipment				Rental Equipment				Other Equipment				Vehicles				Buildings				Assets Under Construction				Land				Total
Balance, December 31, 2018		$	3,577,364			$	86,471			$	139,095			$	32,754			$	62,766			$	—			$	—			$	3,898,450
Depreciation expense			289,056				7,473				13,023				3,521				7,663				—				—				320,736
Disposals			(33,929	)			(17,933	)			(3,274	)			(4,768	)			(58	)			—				—				(59,962	)
Asset decommissioning			(3,518	)			—				—				—				—				—				—				(3,518	)
Reversal of impairment of property, plant and equipment			(5,810	)			—				—				—				—				—				—				(5,810	)
Effect of foreign currency exchange differences			(224,285	)			(141	)			(2,129	)			(797	)			(1,028	)			—				—				(228,380	)
Balance, December 31, 2019			3,598,878				75,870				146,715				30,710				69,343				—				—				3,921,516
Depreciation expense			277,799				7,044				12,013				2,790				5,288				—				—				304,934
Disposals			(73,354	)			(4,631	)			(3,990	)			(2,782	)			(1,319	)			—				—				(86,076	)
Effect of foreign currency exchange differences			(47,350	)			(618	)			(1,052	)			(346	)			(485	)			—				—				(49,851	)
Balance, December 31, 2020		$	3,755,973			$	77,665			$	153,686			$	30,372			$	72,827			$	—			$	—			$	4,090,523