Note 4 - Loans/Leases Receivable - Composition Of Allowance For Credit Losses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Credit Losses, Individually Evaluated for Credit Losses	$ 2,680	$ 660
Allowance for Credit Losses, Collectively Evaluated for Credit Losses	81,696	35,341
Allowance for Credit Losses, Total	84,376	36,001	$ 39,847	$ 34,356
Amortized Cost of Loans Receivable, Individually Evaluated for Credit Losses	14,628	8,661
Amortized Cost of Loans Receivable, Collectively Evaluated for Credit Losses	4,229,163	3,672,685
Net loans/leases receivable	4,166,753	3,654,204
Commercial Portfolio Segment [Member]
Allowance for Credit Losses, Individually Evaluated for Credit Losses	650	170
Allowance for Credit Losses, Collectively Evaluated for Credit Losses	34,771	15,902
Allowance for Credit Losses, Total	35,421	16,072	16,420	14,323
Amortized Cost of Loans Receivable, Individually Evaluated for Credit Losses	5,381	1,846
Amortized Cost of Loans Receivable, Collectively Evaluated for Credit Losses	1,721,342	1,505,979
Commercial Real Estate Portfolio Segment [Member]
Allowance for Credit Losses, Individually Evaluated for Credit Losses	1,938	125
Allowance for Credit Losses, Collectively Evaluated for Credit Losses	40,223	15,254
Allowance for Credit Losses, Total	42,161	15,379	17,719	13,963
Amortized Cost of Loans Receivable, Individually Evaluated for Credit Losses	7,487	3,585
Amortized Cost of Loans Receivable, Collectively Evaluated for Credit Losses	2,100,142	1,732,811
Consumer Portfolio Segment [Member]
Allowance for Credit Losses, Individually Evaluated for Credit Losses	72	80
Allowance for Credit Losses, Collectively Evaluated for Credit Losses	1,226	1,058
Allowance for Credit Losses, Total	1,298	1,138	$ 1,359	$ 1,222
Amortized Cost of Loans Receivable, Individually Evaluated for Credit Losses	205	556
Amortized Cost of Loans Receivable, Collectively Evaluated for Credit Losses	$ 91,097	$ 108,796