Other Assets (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Assets [Abstract]
Equity in joint ventures	$ 20,004,000	$ 6,308,000	$ 0
Deferred financing costs, net	1,570,000	2,275,000
Long term receivables	6,513,000	5,047,000
Other	10,502,000	9,026,000
Total other assets, net	38,589,000	22,656,000
Non qualified defined contribution pension plan	9,800,000	8,300,000
Schedule of Equity Method Investments [Line Items]
Equity in joint ventures	20,004,000	6,308,000	0
Orange Electronic Co., Ltd [Member]
Other Assets [Abstract]
Equity in joint ventures	6,300,000
Schedule of Equity Method Investments [Line Items]
Percentage of minority interest acquired (in hundredths)	25.00%
Equity in joint ventures	6,300,000
Gwo Yng Enterprise Co. [Member]
Other Assets [Abstract]
Equity in joint ventures	14,000,000
Schedule of Equity Method Investments [Line Items]
Percentage of minority interest acquired (in hundredths)	50.00%
Equity in joint ventures	$ 14,000,000