Note 4 - Loans and Allowance for Loan Losses (Details) - Nonaccrual Loans, Excluding Loans Acquired, Segregated by Class of Loans (Loans, excluding acquired loans [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Consumer:
Loans in nonaccrual status	$ 10,153	$ 6,261
Credit Cards [Member]
Consumer:
Loans in nonaccrual status	226	290
Other Consumer [Member]
Consumer:
Loans in nonaccrual status	650	677
Total Consumer Loans [Member]
Consumer:
Loans in nonaccrual status	876	967
Construction Loans [Member]
Consumer:
Loans in nonaccrual status	905	116
Single Family Residential Loans [Member]
Consumer:
Loans in nonaccrual status	3,792	2,957
Other Commercial Real Estate Loans [Member]
Consumer:
Loans in nonaccrual status	3,470	1,726
Total Real Estate Loans [Member]
Consumer:
Loans in nonaccrual status	8,167	4,799
Commercial [Member]
Consumer:
Loans in nonaccrual status	676	378
Agricultural Loans [Member]
Consumer:
Loans in nonaccrual status	434	117
Total Commercial Loans [Member]
Consumer:
Loans in nonaccrual status	$ 1,110	$ 495