Fair-Value Measurements (Schedule of Fair Value of Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2015		Dec. 31, 2014
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Cash equivalents	$ 23,432		$ 14,096
Foreign currency instruments	78		69
Common stock of foreign public company	$ 913		$ 701
Liabilities:
Interest rate swap
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Cash equivalents
Foreign currency instruments
Common stock of foreign public company
Liabilities:
Interest rate swap	$ (1,679)	[1]	$ (1,411)	[2]
Interest Rate Swap [Member]
Derivative liability:
Liability for fixed rate leg	4,700		5,700
Receivable for floating rate leg	$ 3,000		$ 4,300

[1] Net of $3.0 million receivable floating leg and $4.7 million liability fixed leg

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