Note 17 - Subsequent Events (Details) shares in Thousands, $ in Thousands	Jul. 31, 2015 USD ($) shares	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Note 17 - Subsequent Events (Details) [Line Items]
Assets		$ 11,918,316	$ 11,516,846
Loans and Leases Receivable, Gross		9,502,008	8,914,080
Deposits		9,338,863	$ 8,783,460
Asia Bancshares [Member]
Note 17 - Subsequent Events (Details) [Line Items]
Assets		520,500
Loans and Leases Receivable, Gross		413,700
Deposits		437,100
Stockholders' Equity Attributable to Parent		$ 79,300
Asia Bancshares [Member] | Subsequent Event [Member]
Note 17 - Subsequent Events (Details) [Line Items]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares) | shares	2,580
Payments to Acquire Businesses, Gross	$ 57,000
Asia Bancshares [Member] | Subsequent Event [Member] | NEW YORK
Note 17 - Subsequent Events (Details) [Line Items]
Number of Branches Acquired	3
Asia Bancshares [Member] | Subsequent Event [Member] | MARYLAND
Note 17 - Subsequent Events (Details) [Line Items]
Number of Branches Acquired	1