Fair-Value Measurements (Schedule of Fair Value of Financial Assets and Liabilities) (Details) (USD $)	Mar. 31, 2015		Dec. 31, 2014
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Cash equivalents	$ 19,391,000		$ 14,096,000
Foreign currency instruments	286,000		69,000
Common stock of foreign public company	735,000		701,000
Liabilities:
Interest rate swap
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Cash equivalents
Foreign currency instruments
Liabilities:
Interest rate swap	(2,034,000)	[1]	(1,411,000)	[2]
Interest Rate Swap [Member]
Derivative liability:
Liability for fixed rate leg	5,200,000		5,700,000
Receivable for floating rate leg	$ 3,200,000		$ 4,300,000

[1] Net of $3.2 million receivable floating leg and $5.2 million liability fixed leg

[2] Net of $4.3 million receivable floating leg and $5.7 million liability fixed leg