Fair-Value Measurements (Schedule of Fair Value of Financial Assets and Liabilities) (Details) (USD $)	Dec. 31, 2014		Dec. 31, 2013
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Cash equivalents	$ 14,096,000		$ 25,073,000
Foreign currency options	69,000
Common stock of foreign public company	701,000		952,000
Interest rate swaps
Liabilities:
Interest rate swaps
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Cash equivalents
Foreign currency options
Common stock of foreign public company
Interest rate swaps			1,517,000	[1]
Liabilities:
Interest rate swaps	(1,411,000)	[2]	(3,119,000)	[3]
Interest Rate Swap [Member]
Derivative asset:
Liability for fixed rate leg			4,100,000
Receivable for floating rate leg			5,600,000
Derivative liability:
Liability for fixed rate leg	5,700,000		3,800,000
Receivable for floating rate leg	$ 4,300,000		$ 700,000

[1] Net of $5.6 million receivable floating leg and $4.1 million liability fixed leg

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

[3] Net of $0.7 million receivable floating leg and $3.8 million liability fixed leg