Goodwill (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Goodwill [Line Items]
Asset Impairment Charges	$ 265,423				$ 214,889
Goodwill	0				265,423				0	265,423	596,103	114,963
Goodwill, Impairment Loss		0	0	0		0	115,791	0	265,423	330,680	0
Black Thunder [Member]
Goodwill [Line Items]
Goodwill, Impairment Loss										115,800
APP [Member]
Goodwill [Line Items]
Goodwill, Impairment Loss									$ 265,423	$ 214,900