Annual report pursuant to Section 13 and 15(d)

Note 23 - Quarterly Financial Data (Unaudited) - Quarterly Financial Data (Details)

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Note 23 - Quarterly Financial Data (Unaudited) - Quarterly Financial Data (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Interest income $ 101,065 $ 96,110 $ 95,080 $ 96,767 $ 98,187 $ 101,130 $ 97,787 $ 93,699 $ 389,022 $ 390,803 $ 326,627
Interest expense 8,984 11,028 11,846 19,127 22,410 28,125 27,702 24,921 50,985 103,158 63,948
Net interest income 92,081 85,082 83,234 77,640 75,777 73,005 70,085 68,778 338,037 287,645 262,679
Provision for credit losses (1) 6,283 [1] 12,284 [1] 10,283 [1] 13,584 [1] 5,884 [1] 6,985 [1] 4,884 [1] 4,885 [1] 42,434 22,638 21,402
Net income available to common stockholders $ 50,949 $ 43,362 $ 40,417 $ 34,778 $ 41,005 $ 37,563 $ 35,602 $ 35,010 $ 169,506 $ 149,180 $ 136,877
Net income per common share, basic (in dollars per share) $ 0.94 $ 0.80 $ 0.75 $ 0.65 $ 0.77 $ 0.70 $ 0.67 $ 0.65 $ 3.15 $ 2.79 $ 2.57
Net income per common share, diluted (in dollars per share) $ 0.94 $ 0.80 $ 0.75 $ 0.64 $ 0.76 $ 0.69 $ 0.66 $ 0.65 $ 3.13 $ 2.76 $ 2.53
Provision for credit losses (1) $ 6,283 [1] $ 12,284 [1] $ 10,283 [1] $ 13,584 [1] $ 5,884 [1] $ 6,985 [1] $ 4,884 [1] $ 4,885 [1] $ 42,434 $ 22,638 $ 21,402
[1] The first three quarters of 2020 and all of 2019 were estimated and recorded under the incurred loss methodology and not restated for the adoption of ASC 326. The Company elected to delay the adoption of CECL as allowed under the CARES Act.