16. Segment Reporting (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segments	Sep. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segments			2
Net sales	$ 927,565	$ 546,806	$ 2,102,100	$ 1,663,740
Gross profit (loss)	293,015	138,363	520,813	215,657
Depreciation and amortization expense	48,119	44,691	150,006	133,654
Goodwill	14,462		14,462		$ 14,462
Modules Segment [Member]
Segment Reporting Information [Line Items]
Net sales	422,480	371,184	1,187,679	798,744
Gross profit (loss)	124,822	147,806	280,115	134,293
Depreciation and amortization expense	43,137	38,063	132,529	118,448
Goodwill	14,462		14,462		14,462
Systems Segment [Member]
Segment Reporting Information [Line Items]
Net sales	505,085	175,622	914,421	864,996
Gross profit (loss)	168,193	(9,443)	240,698	81,364
Depreciation and amortization expense	4,982	$ 6,628	17,477	$ 15,206
Goodwill	$ 0		$ 0		$ 0