Segment Data (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007
Depreciation and amortization:
Intangible asset amortization	$ 6,774	$ 4,737	$ 3,644	$ 2,861	$ 1,118
Total depreciation and amortization	88,936	89,332	90,411	88,698	87,702
Capital expenditures:
Total capital expenditures	103,469	85,379	69,445	105,026	115,648
Automotive [Member]
Depreciation and amortization:
Total depreciation and amortization	60,252	63,942	65,554	65,309	65,810
Capital expenditures:
Total capital expenditures	61,795	46,888	53,911	72,628	91,359
Industrial [Member]
Depreciation and amortization:
Total depreciation and amortization	7,495	7,208	7,611	7,632	8,565
Capital expenditures:
Total capital expenditures	9,851	4,307	2,987	7,575	8,340
Office products [Member]
Depreciation and amortization:
Total depreciation and amortization	9,999	9,737	9,685	9,825	9,159
Capital expenditures:
Total capital expenditures	22,036	29,866	5,782	9,539	13,294
Electrical/electronic materials [Member]
Depreciation and amortization:
Total depreciation and amortization	1,554	1,414	1,666	1,572	1,566
Capital expenditures:
Total capital expenditures	1,762	1,957	676	1,406	2,340
Corporate [Member]
Depreciation and amortization:
Total depreciation and amortization	2,862	2,294	2,251	1,499	1,484
Capital expenditures:
Total capital expenditures	$ 8,025	$ 2,361	$ 6,089	$ 13,878	$ 315