Segment Reporting (Allocated Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Cost of sales	$ 299,183	$ 260,353	$ 824,179	$ 767,062
Gross profit	422,606	344,950	1,161,538	1,034,400
Operating Expenses:
Sales and marketing	108,202	104,551	318,526	312,499
General and administrative	105,031	66,337	231,111	186,653
Research and development	37,517	34,260	102,472	98,033
Income from operations	171,856	139,802	509,429	437,215
Operating Segments | CAG
Operating Expenses:
Income from operations	139,434	117,691	426,062	370,600
Operating Segments | Water
Operating Expenses:
Income from operations	15,243	16,930	43,383	47,467
Operating Segments | LPD
Operating Expenses:
Income from operations	10,505	4,850	28,417	17,707
Operating Segments | Other
Operating Expenses:
Income from operations	$ 6,674	331	$ 11,567	1,441
Restatement Adjustment | Operating Segments | CAG
Segment Reporting Information [Line Items]
Cost of sales		(428)		(266)
Gross profit		428		266
Operating Expenses:
Sales and marketing		211		322
General and administrative		2,472		1,377
Research and development		4,544		12,062
Total operating expenses		7,227		13,761
Income from operations		(6,799)		(13,495)
Restatement Adjustment | Operating Segments | Water
Segment Reporting Information [Line Items]
Cost of sales		(19)		(12)
Gross profit		19		12
Operating Expenses:
Sales and marketing		9		14
General and administrative		105		(114)
Research and development		20		39
Total operating expenses		134		(61)
Income from operations		(115)		73
Restatement Adjustment | Operating Segments | LPD
Segment Reporting Information [Line Items]
Cost of sales		(24)		(15)
Gross profit		24		15
Operating Expenses:
Sales and marketing		12		18
General and administrative		131		(122)
Research and development		25		49
Total operating expenses		168		(55)
Income from operations		(144)		70
Restatement Adjustment | Operating Segments | Other
Segment Reporting Information [Line Items]
Cost of sales		(10)		(6)
Gross profit		10		6
Operating Expenses:
Sales and marketing		0		0
General and administrative		1,058		2,222
Research and development		0		0
Total operating expenses		1,058		2,222
Income from operations		(1,048)		(2,216)
Previously Reported | Unallocated
Segment Reporting Information [Line Items]
Cost of sales		481		299
Gross profit		(481)		(299)
Operating Expenses:
Sales and marketing		(232)		(354)
General and administrative		(3,766)		(3,363)
Research and development		(4,589)		(12,150)
Total operating expenses		(8,587)		(15,867)
Income from operations		$ 8,106		$ 15,568