Dispositions (Assets and liabilities of disposal groups) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets of discontinued operations	$ 131,582	$ 116,680
Segment, Discontinued Operations [Member]
Accounts receivable, net, of discontinued operations	12,713	16,701
Prepaid expenses of discontinued operations	1,393	2,463
Inventory and other current assets of discontinued operations	1,399	5,576
Current assets of discontinued operations	15,505	24,740
Property, plant and equipment, net, of discontinued operations	116,077	91,171
Intangible and other long-term assets, net, of discontinued operations		769
Long-term assets of discontinued operations	116,077	91,940
Accounts payable of discontinued operations	1,717	20,530
Accrued expenses of discontinued operations	9,015	24,496
Current liabilities of discontinued operations	$ 10,732	45,026
Other long-term liabilities of discontinued operations		$ 16,814