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Dividends Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 6 Months Ended | 12 Months Ended | 0 Months Ended
--- | --- | --- | ---
Jun. 30, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Mar. 13, 2013 Dividend Declared [Member] Subsequent Event [Member]
Subsequent Event [Line Items] |  |  |  |  |
Cash dividend declared (in dollars per share) |  | $ 0.30 | $ 0.20 |  | $ 0.345
Payment of cash dividends |  | $ 70,514 | $ 48,374 | $ 36,638 |
Date dividend to be paid |  |  |  |  | Mar. 26, 2014
Date of record of stockholders to whom dividends will be paid |  |  |  |  | Mar. 14, 2014

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