Acquisitions (Schedule of Net Liabilities Acquired) (Details) (South Valley Bank [Member], USD $) In Thousands, unless otherwise specified	Oct. 31, 2012
South Valley Bank [Member]
Assets:
Cash and cash equivalents	$ 212,711
Available for sale securities	43,899
FHLB stock	5,211
Loans receivable, net	343,510
Covered loans receivable, net	107,075
FDIC indemnification asset	17,364
Property and equipment, net	24,561
Core deposit intangible	3,000
Real estate held for sale	10,857
Covered real estate held for sale	6,031
Goodwill	8,692
Other assets	27,855
Total Assets	810,766
Liabilities:
Customer accounts	735,415
FHLB advances	22,471
Other liabilities	8,985
Total Liabilities	766,871
Net assets acquired	43,895
Consideration provided:
Equity Issued	33,492
Cash paid	10,403
Total considerartion	$ 43,895