Segment Reporting (Detail) - 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]
Revenues	$ 187,697	$ 225,399	$ 501,698	$ 711,753
Gross Profit	24,159	29,444	50,937	94,969
Selling, General & Administrative Expenses	14,408	17,531	47,491	48,978
Amortization Expense	858	437	2,575	1,080
Impairment Expense	0	0	29,017	0
Operating (Loss) Income	8,893	11,476	(28,146)	44,911
Capital and Other Expenditures [Abstract]
Capital Expenditures	1,604	5,572	5,505	18,388
Depreciation Expense	3,752	3,444	11,260	9,785
Other Items	1,556		8,132
Operating Segments
Segment Reporting Information [Line Items]
Revenues	187,697	225,399	501,698	711,753
Corporate/ Other
Segment Reporting Information [Line Items]
Revenues	(2,272)	(1,762)	(4,422)	(10,303)
Gross Profit	(377)	(21)	(404)	(55)
Selling, General & Administrative Expenses	7,725	8,457	21,803	21,565
Amortization Expense	0	0	0	0
Impairment Expense			793
Operating (Loss) Income	(8,102)	(8,478)	(23,000)	(21,620)
Capital and Other Expenditures [Abstract]
Capital Expenditures	28	661	394	2,274
Depreciation Expense	447	632	1,571	1,829
Other Items	17		469
Electrical Systems
Segment Reporting Information [Line Items]
Revenues	121,067	131,442	307,376	417,000
Electrical Systems | Operating Segments
Segment Reporting Information [Line Items]
Revenues	120,723	129,710	305,389	409,471
Gross Profit	16,118	17,134	28,208	54,227
Selling, General & Administrative Expenses	3,166	4,030	13,696	11,855
Amortization Expense	729	303	2,188	676
Impairment Expense			23,415
Operating (Loss) Income	12,223	12,801	(11,091)	41,696
Capital and Other Expenditures [Abstract]
Capital Expenditures	1,418	3,847	3,936	13,267
Depreciation Expense	2,196	1,771	6,455	4,770
Other Items	1,204		6,651
Electrical Systems | Intersegment Revenues
Segment Reporting Information [Line Items]
Revenues	(344)	(1,732)	(1,987)	(7,529)
Global Seating
Segment Reporting Information [Line Items]
Revenues	68,902	95,719	198,744	305,056
Global Seating | Operating Segments
Segment Reporting Information [Line Items]
Revenues	66,974	95,689	196,309	302,282
Gross Profit	8,418	12,331	23,133	40,797
Selling, General & Administrative Expenses	3,517	5,044	11,992	15,558
Amortization Expense	129	134	387	404
Impairment Expense			4,809
Operating (Loss) Income	4,772	7,153	5,945	24,835
Capital and Other Expenditures [Abstract]
Capital Expenditures	158	1,064	1,175	2,847
Depreciation Expense	1,109	1,041	3,234	3,186
Other Items	335		1,012
Global Seating | Intersegment Revenues
Segment Reporting Information [Line Items]
Revenues	$ (1,928)	$ (30)	$ (2,435)	$ (2,774)