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Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2019

Disclosure Of Property Plant And Equipment [Abstract]

Schedule of Property, Plant and Equipment

		2019				2018
Cost		$	6,670,979			$	6,937,062
Accumulated depreciation			(3,921,516	)			(3,898,450	)
		$	2,749,463			$	3,038,612
Rig equipment			2,510,505				2,745,172
Rental equipment			34,437				43,992
Other equipment			38,604				52,195
Vehicles			7,796				12,702
Buildings			56,834				65,561
Assets under construction			67,740				84,561
Land			33,547				34,429
		$	2,749,463			$	3,038,612

Cost

		Rig Equipment				Rental Equipment				Other Equipment				Vehicles				Buildings				Assets Under Construction				Land				Total
Balance, December 31, 2017		$	6,034,166			$	148,011			$	244,950			$	43,201			$	127,385			$	102,035			$	33,886			$	6,733,634
Additions			7,013				—				347				—				569				106,647				—				114,576
Disposals			(32,153	)			(18,227	)			(59,865	)			(228	)			(3,663	)			—				(893	)			(115,029	)
Reclassifications			127,668				—				507				—				—				(128,175	)			—				—
Reclassification to assets held for sale			(135,398	)			—				—				—				—				—				—				(135,398	)
Effect of foreign currency exchange differences			321,240				679				5,351				2,483				4,036				4,054				1,436				339,279
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

Accumulated Depreciation

		Rig Equipment				Rental Equipment				Other Equipment				Vehicles				Buildings				Assets Under Construction				Land				Total
Balance, December 31, 2017		$	3,210,384			$	87,832			$	178,390			$	26,921			$	56,283			$	—			$	—			$	3,559,810
Depreciation expense			335,215				9,418				15,993				4,820				8,126				—				—				373,572
Disposals			(28,399	)			(11,249	)			(59,857	)			(220	)			(3,161	)			—				—				(102,886	)
Reclassification to assets held for sale			(115,740	)			—				—				—				—				—				—				(115,740	)
Effect of foreign currency exchange differences			175,904				470				4,569				1,233				1,518				—				—				183,694
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