Fair-Value Measurements (Schedule of Fair Value of Financial Assets and Liabilities) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
Interest Rate Swap [Member]
Derivative asset:
Liability for fixed rate leg	$ 4,100,000
Receivable for floating rate leg	5,300,000
Derivative liability:
Liability for fixed rate leg	4,300,000		5,900,000
Receivable for floating rate leg	800,000		1,200,000
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Cash equivalents	35,825,000		33,171,000
Foreign exchange contracts
Common stock of foreign public company	848,000		562,000
Interest rate swap
Liabilities:
Interest rate swap
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Cash equivalents
Foreign exchange contracts	216,000
Common stock of foreign public company
Interest rate swap	1,244,000	[1]
Liabilities:
Interest rate swap	$ (3,489,000)	[2]	$ (4,718,000)	[3]

[1] Net of $5.3 million receivable floating leg and $4.1 million liability fixed leg

[2] Net of $0.8 million receivable floating leg and $4.3 million liability fixed leg

[3] Net of $1.2 million receivable floating leg and $5.9 million liability fixed leg