Note 14 - Commitments and Off-balance-sheet Risk (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure Text Block Supplement [Abstract]

Summary of Contractual Amounts of Financial Instruments with Off-balance Sheet Risk [Table Text Block]

	2014		2013
Commercial unused lines of credit	$	554,856,000	$	257,937,000
Unused lines of credit secured by 1 – 4 family residential properties		60,983,000		23,429,000
Credit card unused lines of credit		11,649,000		9,013,000
Other consumer unused lines of credit		8,673,000		5,695,000
Commitments to make loans		110,126,000		58,799,000
Standby letters of credit		35,461,000		19,670,000
Total commitments	$	781,748,000	$	374,543,000

Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]

	2014				2013
	Contract		Carrying		Contract		Carrying
	Amount		Value		Amount		Value
Standby letters of credit	$	35,461,000	$	150,000	$	19,670,000	$	148,000