Discontinued Operations (Carrying Amounts of Assets and Liabilities Included in Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Discontinued Operation Balance Sheet Disclosures [Abstract]
Cash and cash equivalents	$ 849
Accounts receivable, net	60,369
Inventories	3,965
Other current assets	5,177
Current Assets of Discontinued Operations	70,360	0
Property, plant and equipment, net	116,639
Goodwill, net	13,602
Prepaid pension cost	50,000
Deferred charges and other assets	4,499
Noncurrent Assets of Discontinued Operations	184,740	0
Accounts payable and accrued liabilities	35,616
Deferred revenue	22,207
Current Liabilities of Discontinued Operations	57,823	0
Postretirement benefits other than pensions	24,999
Accrued compensation and related benefits	8,998
Other liabilities	11,735
Noncurrent Liabilities of Discontinued Operations	$ 45,732	$ 0