Guarantor Disclosures (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	Jul. 17, 2012	Dec. 31, 2012	Sep. 30, 2012
Condensed Financial Statements, Captions [Line Items]
Stated interest rate		6.50%
Ownership interest in guarantor subsidiaries		100.00%
Three Point Six Zero Percentage Senior Notes Due Twenty Twenty Two [Member]
Condensed Financial Statements, Captions [Line Items]
Stated interest rate	3.60%	3.60%
Maturity	2022	2022
Senior notes, minimum debt amount guaranteed by subsidiaries		$ 5,000	$ 5,000