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Dividends and Share Repurchases	6 Months Ended
	Mar. 31, 2018
Dividends [Abstract]
Dividends and Share Repurchases	Dividends and Share Repurchases On February 23, 2018, the Company paid a regular dividend on common stock of $0.17 per share, which represented the 140th consecutive quarterly cash dividend. Dividends per share were $0.17 and $0.40 for the quarters ended March 31, 2018 and 2017, respectively. On April 30, 2018, the Company declared a regular dividend on common stock of $0.17 per share, which represents its 141st consecutive quarterly cash dividend. This dividend will be paid on May 25, 2018 to common shareholders of record on May 11, 2018. For the three months ended March 31, 2018, the Company repurchased 1,673,436 shares at an average price of $34.66. No shares of common stock were issued during the three months ended March 31, 2018 to investors holding warrants previously issued as part of the 2008 Troubled Asset Relief Program ("TARP"). As of March 31, 2018, 112,649 such warrants remain outstanding. Net of warrant cash repurchase activity, there are 4,080,149 remaining shares authorized to be repurchased under the current Board approved share repurchase program.

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The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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