Note 5 - Cash, Cash Equivalents and Restricted Cash	3 Months Ended
Mar. 31, 2022
Notes to Financial Statements
Cash and Cash Equivalents Disclosure [Text Block]	*5. Cash, Cash Equivalents and Restricted Cash* The Company manages its cash and cash equivalents based upon the Company’s operating, investment, and financing activities. Cash and cash equivalents, including for purposes of reporting cash flows, consist of cash on hand, amounts due from banks, and short-term investments with original maturity of three months or less. The Company is required to maintain reserves with the Federal Reserve Bank. Reserve requirements are based on a percentage of deposit liabilities. There were zero average reserve balances required for the three months ended March 31, 2022 and for the year ended December 31, 2021. The average excess balance with Federal Reserve Bank was $1.6 billion for the three months ended March 31, 2022 and $1.6 billion for the year ended December 31, 2021. As of March 31, 2022 and December 31, 2021, the Company had $3.3 million and $24.3 million, respectively, on deposit in a cash margin account that serves as collateral for interest rate swaps. These amounts included $2.2 million and $5.9 million as of March 31, 2022 and December 31, 2021, respectively, on deposit in a cash margin account that serves as collateral for the Bancorp’s interest rate swaps. As of March 31, 2022 and December 31, 2021, the Company held zero and $690 thousand, respectively, in a restricted escrow account with a major bank for its alternative energy investments.

Note 5 - Cash, Cash Equivalents and Restricted Cash

3 Months Ended

Mar. 31, 2022

Cash and Cash Equivalents Disclosure [Text Block]

5. Cash, Cash Equivalents and Restricted Cash

The Company manages its cash and cash equivalents based upon the Company’s operating, investment, and financing activities. Cash and cash equivalents, including for purposes of reporting cash flows, consist of cash on hand, amounts due from banks, and short-term investments with original maturity of three months or less.

The Company is required to maintain reserves with the Federal Reserve Bank. Reserve requirements are based on a percentage of deposit liabilities. There were zero average reserve balances required for the three months ended March 31, 2022 and for the year ended December 31, 2021. The average excess balance with Federal Reserve Bank was $1.6 billion for the three months ended March 31, 2022 and $1.6 billion for the year ended December 31, 2021. As of March 31, 2022 and December 31, 2021, the Company had $3.3 million and $24.3 million, respectively, on deposit in a cash margin account that serves as collateral for interest rate swaps. These amounts included $2.2 million and $5.9 million as of March 31, 2022 and December 31, 2021, respectively, on deposit in a cash margin account that serves as collateral for the Bancorp’s interest rate swaps. As of March 31, 2022 and December 31, 2021, the Company held zero and $690 thousand, respectively, in a restricted escrow account with a major bank for its alternative energy investments.