Significant Accounting Policies - Additional Information (Details) - USD ($)	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2018	Feb. 26, 2019
Accounting Policies [Line Items]
Lease revenues	$ 6,563,000		$ 10,000,000		$ 16,189,000	$ 20,407,000
Goodwill impairment loss	0	$ 7,700,000	0			0
Inventory write-down	0	17,300,000			17,272,000
Long-lived asset impairment	942,000	6,900,000			7,854,000
Severance costs	0	8,400,000			8,399,000
Restructuring costs		100,000
Restructuring and other charges	1,587,000				34,300,000		$ 98,600,000
Other restructuring charges	$ 645,000		$ 1,000,000.0		$ 775,000	$ 3,400,000
Shares authorized to be purchased (up to) (in shares)								$ 100,000,000
Treasury stock shares (in shares)	0		22,073		808,389	50,151
Average price of shares (in dollars per share)			$ 39.87		$ 30.91	$ 39.80
Treasury stock, value of acquired shares			$ 900,000		$ 25,000,000.0	$ 2,000,000.0
Reclassified from selling general and administrative cost to foreign currency transaction gain loss			$ 200,000	$ 3,200,000		$ 900,000
Eastern Hemisphere [Member]
Accounting Policies [Line Items]
Goodwill impairment loss		$ 7,700,000			7,700,000
Running Tools [Member]
Accounting Policies [Line Items]
Lease revenues	$ 6,000,000.0				15,100,000
Rental Facilities [Member]
Accounting Policies [Line Items]
Lease revenues	$ 600,000				$ 1,100,000