Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill And Other Intangible Assets [Line Items]
Amortization of other intangible assets	$ 3,800,000	$ 3,300,000	$ 2,700,000
Purchased software costs, capitalized	1,178,000	1,908,000	1,124,000
Purchased software net of accumulated amortization	2,700,000	2,500,000
Accumulated amortization of purchased software costs	26,600,000	25,000,000
Tianjin Building Held-for-Sale		5,400,000
Proceeds from sale of Tianjin Subsidiary	5,700,000
Gain on sale of subsidiary	$ 1,547,000	$ 0	$ 0
Minimum [Member] | Capitalized Purchased Software Costs [Member]
Goodwill And Other Intangible Assets [Line Items]
Estimated useful life	3 years
Maximum [Member] | Capitalized Purchased Software Costs [Member]
Goodwill And Other Intangible Assets [Line Items]
Estimated useful life	7 years