Derivatives (Gain Loss on Debt and Swap) (Details) (Fair Value Hedging [Member], Designated as Hedging Instrument [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Net impact on Condensed Consolidated Statements of Comprehensive Income (Loss)	$ 3,329	$ (144)	$ 3,748	$ 492
Other (Expense) Income [Member] \| Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Net impact on Condensed Consolidated Statements of Comprehensive Income (Loss)	(173)	(144)	246	492
Old Rate Agreement [Member] \| Loss on Redemption of Debt [Member] \| Interest rate contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on carrying value adjustment on debt related to interest rate swap	$ 3,502	$ 0	$ 3,502	$ 0

Amount of unrealized gain (loss) included in earnings related to the fair value of the hedged item in an interest rate fair value hedge, offset by the gain (loss) on the hedging instrument to the extent that the fair value hedge is determined to be effective.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5618551-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959

Name:	us-gaap_IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration