Fair Values (Details 4) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
8 3/4 % Senior Notes [Member]
Estimated fair values and carrying values of instruments
Carrying Amount	$ 300,000	$ 300,000
Fair Value	327,000	325,500
6 7/8 % Senior Notes [Member]
Estimated fair values and carrying values of instruments
Carrying Amount	300,000	0
Fair Value	$ 297,000	$ 0

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents notes payable as of the balance sheet date.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 20, 22

-Article 5

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

Name:	us-gaap_NotesPayableFairValueDisclosure
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant