Fair-Value Measurements (Schedule of Fair Value of Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2016		Dec. 31, 2015
Interest Rate Current Swap [Member]
Derivative liability:
Liability for fixed rate leg	$ 17,800		$ 9,800
Receivable for floating rate leg	13,400		7,400
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Cash equivalents	16,366		5,189
Assets held for sale
Foreign currency options
Common stock of unaffiliated foreign public company	744	[1]	819
Liabilities:
Interest rate swaps
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Assets:
Cash equivalents
Assets held for sale
Foreign currency options	366
Common stock of unaffiliated foreign public company
Liabilities:
Interest rate swaps	4,336	[2]	(2,400)	[3]
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Assets:
Cash equivalents
Assets held for sale	5,078		4,988
Foreign currency options
Common stock of unaffiliated foreign public company
Liabilities:
Interest rate swaps

[1] Original cost basis $0.5 million

[2] Net of $13.4 million receivable floating leg and $17.8 million liability fixed leg

[3] Net of $7.4 million receivable floating leg and $9.8 million liability fixed leg