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Special Cash Dividend (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 1 Months Ended | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
May 31, 2013 | May 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012 | Jun. 21, 2013
Special Cash Dividend [Abstract] |  |  |  |  |  |  |
Dividends declared per share (in dollars per share) | $ 5.00 | $ 6.00 | $ 0 | $ 0 | $ 5.00 | $ 6.00 |
Cash dividends paid |  |  |  |  | $ 340,772 |  |
Dividends declared but unpaid |  |  | 1,322 |  | 1,322 |  |
Retained earnings as of the dividend declaration date |  |  |  |  |  |  | $ 4,934

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 + Details
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