Note 6 - Fair Value (Details) - Financial Instruments (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Financial Assets:
Carrying Amount	$ 1,457,046	$ 1,498,762
Financial Liabilities:
Carrying Amount	1,324,602	1,351,704
Interest Bearing Deposit Liabilities [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Liabilities:
Estimated Fair Value	0	0
Interest Bearing Deposit Liabilities [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Liabilities:
Estimated Fair Value	0	0
Interest Bearing Deposit Liabilities [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Liabilities:
Estimated Fair Value	(1,187,225)	(1,243,712)
Interest Bearing Deposit Liabilities [Member]
Financial Liabilities:
Carrying Amount	(1,208,302)	(1,241,401)
Estimated Fair Value	(1,187,225)	(1,243,712)
Securities Loaned or Sold under Agreements to Repurchase [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Liabilities:
Estimated Fair Value	0	0
Securities Loaned or Sold under Agreements to Repurchase [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Liabilities:
Estimated Fair Value	(43,661)	(42,785)
Securities Loaned or Sold under Agreements to Repurchase [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Liabilities:
Estimated Fair Value	0	0
Securities Loaned or Sold under Agreements to Repurchase [Member]
Financial Liabilities:
Carrying Amount	(43,661)	(42,785)
Estimated Fair Value	(43,661)	(42,785)
Federal Home Loan Bank Advance [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Liabilities:
Estimated Fair Value	0	0
Federal Home Loan Bank Advance [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Liabilities:
Estimated Fair Value	0	0
Federal Home Loan Bank Advance [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Liabilities:
Estimated Fair Value	(28,964)	(24,122)
Federal Home Loan Bank Advance [Member]
Financial Liabilities:
Carrying Amount	(27,862)	(22,493)
Estimated Fair Value	(28,964)	(24,122)
Subordinated Debt Obligations [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Liabilities:
Estimated Fair Value	0	0
Subordinated Debt Obligations [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Liabilities:
Estimated Fair Value	0	0
Subordinated Debt Obligations [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Liabilities:
Estimated Fair Value	(25,114)	(36,093)
Subordinated Debt Obligations [Member]
Financial Liabilities:
Carrying Amount	(36,084)	(36,084)
Estimated Fair Value	(25,114)	(36,093)
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Estimated Fair Value	51,751	99,601
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Estimated Fair Value	0	0
Cash and Cash Equivalents [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Estimated Fair Value	0	0
Cash and Cash Equivalents [Member]
Financial Assets:
Carrying Amount	51,751	99,601
Estimated Fair Value	51,751	99,601
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Estimated Fair Value	2,679	2,927
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Estimated Fair Value	0	0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Estimated Fair Value	0	0
Certificates of Deposit [Member]
Financial Assets:
Carrying Amount	2,679	2,927
Estimated Fair Value	2,679	2,927
Trading Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Estimated Fair Value	12	6
Trading Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Estimated Fair Value	0	0
Trading Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Estimated Fair Value	0	0
Trading Securities [Member]
Financial Assets:
Carrying Amount	12	6
Estimated Fair Value	12	6
Securities Available For Sale [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Estimated Fair Value	1,773	91
Securities Available For Sale [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Estimated Fair Value	328,966	331,717
Securities Available For Sale [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Estimated Fair Value	20,271	21,870
Securities Available For Sale [Member]
Financial Assets:
Carrying Amount	351,010	353,678
Estimated Fair Value	351,010	353,678
Federal Home Loan Bank Stock [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Estimated Fair Value	0	0
Federal Home Loan Bank Stock [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Estimated Fair Value	0	0
Federal Home Loan Bank Stock [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Estimated Fair Value	7,266	7,266
Federal Home Loan Bank Stock [Member]
Financial Assets:
Carrying Amount	7,266	7,266
Estimated Fair Value	7,266	7,266
Loans Held For Sale [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Estimated Fair Value	0	0
Loans Held For Sale [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Estimated Fair Value	992	2,921
Loans Held For Sale [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Estimated Fair Value	0	0
Loans Held For Sale [Member]
Financial Assets:
Carrying Amount	992	2,921
Estimated Fair Value	992	2,921
Loans Receivable [Member] | Fair Value, Inputs, Level 1 [Member]
Financial Assets:
Estimated Fair Value	0	0
Loans Receivable [Member] | Fair Value, Inputs, Level 2 [Member]
Financial Assets:
Estimated Fair Value	0	0
Loans Receivable [Member] | Fair Value, Inputs, Level 3 [Member]
Financial Assets:
Estimated Fair Value	962,654	930,354
Loans Receivable [Member]
Financial Assets:
Carrying Amount	954,565	942,422
Estimated Fair Value	$ 962,654	$ 930,354