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Acquisitions (Narrative) (Details) (USD $) |  |  |  | 3 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2013 | Sep. 30, 2012 | Oct. 31, 2012 South Valley Bank [Member] branches | Jun. 30, 2013 Fair Value Adjustment [Member] South Valley Bank [Member] | Oct. 31, 2012 Recorded Book Values [Member] South Valley Bank [Member]
Business Acquisition [Line Items] |  |  |  |  |
Loans receivable, net |  |  | $ 361,200,000 |  | $ 382,634,000
Covered loans receivable, net |  |  | 107,946,000 |  | 107,075,000
Customer accounts |  |  | 737,395,000 |  | 735,415,000
Transaction deposits acquired | 3,448,583,000 | 2,946,453,000 |  |  | 533,000,000
Number of branches acquired (in branches) |  |  | 24 |  |
Total considerartion |  |  | 43,895,000 |  |
Equity Issued |  |  | 33,492,000 |  |
Cash paid |  |  | 10,403,000 |  |
Potential reduction in purchase price, earn-out assets |  |  | 14,000,000 |  |
Earn-out assets accrued |  |  | 5,000,000 |  |
Decrease in real estate held for sale |  |  |  | 2,394,000 |
Increase in goodwill |  |  |  | 1,517,000 |
Increase in other assets |  |  |  | $ 854,000 |

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