Treasury Stock (Details) (USD $) In Thousands, except Share data	6 Months Ended	10 Months Ended
Jun. 30, 2011	Jun. 30, 2011	Aug. 16, 2010
Treasury Stock (Textuals) [Abstract]
Authorized to repurchase common stock			25,000
Expiration date on the repurchase authorizations	Sep. 30, 2011	Sep. 30, 2011
Common stock acquired, shares	1,557	1,607
Aggregate cost shares of common stock	$ 22,369	$ 23,151

Cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 1
-Section B
-Paragraph 7
-Subparagraph b

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration