Commitments and Contingencies - Warranty Account Activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Movement in Product Warranty Accrual [Roll Forward]
Beginning balance	$ 34,862	$ 43,302	$ 54,512
Assumed liabilities from acquisition	12,946	0	0
New product warranties	3,772	7,849	7,987
Other adjustments and expirations, net	22,741	(393)	5,933
Claims activity	(12,753)	(18,094)	(24,364)
Effect of change in exchange rates	(1,125)	2,198	(766)
Ending balance	60,443	34,862	43,302
Less: current portion of warranty	47,205	21,150	24,874
Long-term warranty	13,238	13,712	18,428
Total warranty expense (benefit)	26,513	(2,054)	13,920
Loss Contingencies [Line Items]
Other adjustments due to replacement of certain gas meters	22,741	$ (393)	$ 5,933
Insurance recoveries	8,000
Device Solutions [Member]
Movement in Product Warranty Accrual [Roll Forward]
Other adjustments and expirations, net	11,400
Loss Contingencies [Line Items]
Other adjustments due to replacement of certain gas meters	$ 11,400