Summary of Significant Accounting Policies (Fair Value Measurements) (Details) (Interest Rate Swap [Member], Recurring [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Liabilities:
Interest Rate Swaps	$ 18,741	$ 3,886
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Liabilities:
Interest Rate Swaps	0	0
Significant Other Observable Inputs (Level 2) [Member]
Liabilities:
Interest Rate Swaps	18,741	3,886
Unobservable Inputs (Level 3) [Member]
Liabilities:
Interest Rate Swaps	$ 0	$ 0

This element represents the aggregate of the liabilities reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258

Name:	us-gaap_LiabilitiesFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant