16. Segment Reporting (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segments	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segments			2
Net sales	$ 642,411	$ 584,956	$ 1,174,535	$ 1,116,934
Gross profit (loss)	137,460	77,182	227,798	77,294
Depreciation and amortization expense	50,956	45,169	101,887	88,963
Goodwill	14,462		14,462		$ 14,462
Modules Segment [Member]
Segment Reporting Information [Line Items]
Net sales	371,518	228,745	765,199	427,560
Gross profit (loss)	79,941	11,483	155,293	(13,513)
Depreciation and amortization expense	44,719	40,850	89,392	80,385
Goodwill	14,462		14,462		14,462
Systems Segment [Member]
Segment Reporting Information [Line Items]
Net sales	270,893	356,211	409,336	689,374
Gross profit (loss)	57,519	65,699	72,505	90,807
Depreciation and amortization expense	6,237	$ 4,319	12,495	$ 8,578
Goodwill	$ 0		$ 0		$ 0