Note 13 - Commitments and Off-balance-sheet Risk (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Summary of Contractual Amounts of Financial Instruments With Off Balance Sheet Risk [Table Text Block]

	2020		2019
Commercial unused lines of credit	$	1,019,496,000	$	776,493,000
Unused lines of credit secured by 1 – 4 family residential properties		59,396,000		60,858,000
Credit card unused lines of credit		72,495,000		58,199,000
Other consumer unused lines of credit		30,707,000		18,135,000
Commitments to make loans		227,558,000		101,961,000
Standby letters of credit		20,543,000		22,798,000
Total commitments	$	1,430,195,000	$	1,038,444,000

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

	2020				2019
	Contract		Carrying		Contract		Carrying
	Amount		Value		Amount		Value
Standby letters of credit	$	20,543,000	$	138,000	$	22,798,000	$	160,000