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Loans and Allowance for Loan Losses | 12 Months Ended
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Dec. 31, 2020
Loans and Allowance for Loan Losses |
Loans and Allowance for Loan Losses | Note 3: Loans and Allowance for Loan Losses Classes of loans at December 31, 2020 and 2019, included: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
​ | ​ | (In Thousands)
One- to four-family residential construction |  | $ | 42,793 |  | $ | 33,963
Subdivision construction | ​ |  | 30,894 | ​ |  | 16,088
Land development | ​ |  | 54,010 | ​ |  | 40,431
Commercial construction | ​ |  | 1,212,837 | ​ |  | 1,322,861
Owner occupied one- to four-family residential | ​ |  | 470,436 | ​ |  | 387,016
Non-owner occupied one- to four-family residential | ​ |  | 114,569 | ​ |  | 120,343
Commercial real estate | ​ |  | 1,553,677 | ​ |  | 1,494,172
Other residential | ​ |  | 1,021,145 | ​ |  | 866,006
Commercial business | ​ |  | 370,898 | ​ |  | 313,209
Industrial revenue bonds | ​ |  | 14,003 | ​ |  | 13,189
Consumer auto | ​ |  | 86,173 | ​ |  | 151,854
Consumer other | ​ |  | 40,762 | ​ |  | 46,720
Home equity lines of credit | ​ |  | 114,689 | ​ |  | 118,988
Loans acquired and accounted for under ASC 310-30, net of discounts | ​ |  | 98,643 | ​ |  | 127,206
​ | ​ |  | 5,225,529 | ​ |  | 5,052,046
Undisbursed portion of loans in process | ​ |  | (863,722) | ​ |  | (850,666)
Allowance for loan losses | ​ |  | (55,743) | ​ |  | (40,294)
Deferred loan fees and gains, net | ​ |  | (9,260) | ​ |  | (7,104)
​ | ​ | $ | 4,296,804 | ​ | $ | 4,153,982
​ Classes of loans by aging were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2020
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Total Loans
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Over 90 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Total | ​ | > 90 Days Past
​ | ​ | 30-59 Days | ​ | 60-89 Days | ​ | Days | ​ | Total Past | ​ | ​ | ​ | ​ | Loans | ​ | Due and
​ |  | Past Due |  | Past Due |  | Past Due |  | Due |  | Current |  | Receivable |  | Still Accruing
​ | ​ | (In Thousands)
One- to four-family residential construction | ​ | $ | 1,365 | ​ | $ | — | ​ | $ | — | ​ | $ | 1,365 | ​ | $ | 41,428 | ​ | $ | 42,793 | ​ | $ | —
Subdivision construction | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 30,894 | ​ |  | 30,894 | ​ |  | —
Land development | ​ |  | 20 | ​ |  | — | ​ |  | — | ​ |  | 20 | ​ |  | 53,990 | ​ |  | 54,010 | ​ |  | —
Commercial construction | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 1,212,837 | ​ |  | 1,212,837 | ​ |  | —
Owner occupied one- to four- family residential | ​ |  | 1,379 | ​ |  | 113 | ​ |  | 1,502 | ​ |  | 2,994 | ​ |  | 467,442 | ​ |  | 470,436 | ​ |  | —
Non-owner occupied one- to four-family residential | ​ |  | — | ​ | ​ | — | ​ | ​ | 69 | ​ | ​ | 69 | ​ | ​ | 114,500 | ​ | ​ | 114,569 | ​ |  | —
Commercial real estate | ​ |  | — | ​ |  | 79 | ​ |  | 587 | ​ |  | 666 | ​ |  | 1,553,011 | ​ |  | 1,553,677 | ​ |  | —
Other residential | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 1,021,145 | ​ |  | 1,021,145 | ​ |  | —
Commercial business | ​ |  | — | ​ |  | — | ​ |  | 114 | ​ |  | 114 | ​ |  | 370,784 | ​ |  | 370,898 | ​ |  | —
Industrial revenue bonds | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 14,003 | ​ |  | 14,003 | ​ |  | —
Consumer auto | ​ |  | 364 | ​ |  | 119 | ​ |  | 169 | ​ |  | 652 | ​ |  | 85,521 | ​ |  | 86,173 | ​ |  | —
Consumer other | ​ |  | 443 | ​ |  | 7 | ​ |  | 94 | ​ |  | 544 | ​ |  | 40,218 | ​ |  | 40,762 | ​ |  | —
Home equity lines of credit | ​ |  | 153 | ​ |  | 111 | ​ |  | 508 | ​ |  | 772 | ​ |  | 113,917 | ​ |  | 114,689 | ​ |  | —
Loans acquired and accounted for under ASC 310-30, net of discounts | ​ |  | 1,662 | ​ |  | 641 | ​ |  | 3,843 | ​ |  | 6,146 | ​ |  | 92,497 | ​ |  | 98,643 | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  | 5,386 | ​ |  | 1,070 | ​ |  | 6,886 | ​ |  | 13,342 | ​ |  | 5,212,187 | ​ |  | 5,225,529 | ​ |  | —
Less: Loans acquired and accounted for under ASC 310-30, net of discounts | ​ |  | 1,662 | ​ |  | 641 | ​ |  | 3,843 | ​ |  | 6,146 | ​ |  | 92,497 | ​ |  | 98,643 | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 3,724 | ​ | $ | 429 | ​ | $ | 3,043 | ​ | $ | 7,196 | ​ | $ | 5,119,690 | ​ | $ | 5,126,886 | ​ | $ | —
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2019
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Total Loans
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Over 90 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Total | ​ | > 90 Days Past
​ | ​ | 30-59 Days | ​ | 60-89 Days | ​ | Days | ​ | Total Past | ​ | ​ | ​ | ​ | Loans | ​ | Due and
​ |  | Past Due |  | Past Due |  | Past Due |  | Due |  | Current |  | Receivable |  | Still Accruing
​ | ​ | (In Thousands)
One- to four-family residential construction | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 33,963 | ​ | $ | 33,963 | ​ | $ | —
Subdivision construction | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 16,088 | ​ |  | 16,088 | ​ |  | —
Land development | ​ |  | — | ​ |  | 27 | ​ |  | — | ​ |  | 27 | ​ |  | 40,404 | ​ |  | 40,431 | ​ |  | —
Commercial construction | ​ |  | 15,085 | ​ |  | — | ​ |  | — | ​ |  | 15,085 | ​ |  | 1,307,776 | ​ |  | 1,322,861 | ​ |  | —
Owner occupied one- to four- family residential | ​ |  | 1,453 | ​ |  | 1,631 | ​ |  | 1,198 | ​ |  | 4,282 | ​ |  | 382,734 | ​ |  | 387,016 | ​ |  | —
Non-owner occupied one- to four-family residential | ​ |  | 152 | ​ |  | — | ​ |  | 181 | ​ |  | 333 | ​ |  | 120,010 | ​ |  | 120,343 | ​ |  | —
Commercial real estate | ​ |  | 549 | ​ |  | 119 | ​ |  | 632 | ​ |  | 1,300 | ​ |  | 1,492,872 | ​ |  | 1,494,172 | ​ |  | —
Other residential | ​ |  | 376 | ​ |  | — | ​ |  | — | ​ |  | 376 | ​ |  | 865,630 | ​ |  | 866,006 | ​ |  | —
Commercial business | ​ |  | 60 | ​ |  | — | ​ |  | 1,235 | ​ |  | 1,295 | ​ |  | 311,914 | ​ |  | 313,209 | ​ |  | —
Industrial revenue bonds | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 13,189 | ​ |  | 13,189 | ​ |  | —
Consumer auto | ​ |  | 1,101 | ​ |  | 259 | ​ |  | 558 | ​ |  | 1,918 | ​ |  | 149,936 | ​ |  | 151,854 | ​ |  | —
Consumer other | ​ |  | 278 | ​ |  | 233 | ​ |  | 198 | ​ |  | 709 | ​ |  | 46,011 | ​ |  | 46,720 | ​ |  | —
Home equity lines of credit | ​ |  | 296 | ​ |  | — | ​ |  | 517 | ​ |  | 813 | ​ |  | 118,175 | ​ |  | 118,988 | ​ |  | —
Loans acquired and accounted for under ASC 310-30, net of discounts | ​ |  | 2,177 | ​ |  | 709 | ​ |  | 6,191 | ​ |  | 9,077 | ​ |  | 118,129 | ​ |  | 127,206 | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  | 21,527 | ​ |  | 2,978 | ​ |  | 10,710 | ​ |  | 35,215 | ​ |  | 5,016,831 | ​ |  | 5,052,046 | ​ |  | —
Less: Loans acquired and accounted for under ASC 310-30, net of discounts | ​ |  | 2,177 | ​ |  | 709 | ​ |  | 6,191 | ​ |  | 9,077 | ​ |  | 118,129 | ​ |  | 127,206 | ​ |  | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 19,350 | ​ | $ | 2,269 | ​ | $ | 4,519 | ​ | $ | 26,138 | ​ | $ | 4,898,702 | ​ | $ | 4,924,840 | ​ | $ | —
​ Non-accruing loans are summarized as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31,
​ |  | 2020 |  | 2019
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​
One- to four-family residential construction | ​ | $ | — | ​ | $ | —
Subdivision construction | ​ |  | — | ​ |  | —
Land development | ​ |  | — | ​ |  | —
Commercial construction | ​ |  | — | ​ |  | —
Owner occupied one- to four-family residential | ​ |  | 1,502 | ​ |  | 1,198
Non-owner occupied one- to four-family residential | ​ |  | 69 | ​ |  | 181
Commercial real estate | ​ |  | 587 | ​ |  | 632
Other residential | ​ |  | — | ​ |  | —
Commercial business | ​ |  | 114 | ​ |  | 1,235
Industrial revenue bonds | ​ |  | — | ​ |  | —
Consumer auto | ​ |  | 169 | ​ |  | 558
Consumer other | ​ |  | 94 | ​ |  | 198
Home equity lines of credit | ​ |  | 508 | ​ |  | 517
​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 3,043 | ​ | $ | 4,519
​ The following tables present the activity in the allowance for loan losses by portfolio segment for the years ended December 31, 2020, 2019 and 2018, respectively. Also presented are the balance in the allowance for loan losses and the recorded investment in loans based on portfolio segment and impairment method as of the years ended December 31, 2020, 2019, and 2018, respectively: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2020
​ | ​ | One- to Four- | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Family | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Residential | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | and | ​ | Other | ​ | Commercial | ​ | Commercial | ​ | Commercial | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Construction |  | Residential |  | Real Estate |  | Construction |  | Business |  | Consumer |  | Total
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for Loan Losses |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Balance, January 1, 2020 | ​ | $ | 4,339 | ​ | $ | 5,153 | ​ | $ | 24,334 | ​ | $ | 3,076 | ​ | $ | 1,355 | ​ | $ | 2,037 | ​ | $ | 40,294
Provision (benefit) charged to expense | ​ |  | 84 | ​ |  | 4,042 | ​ |  | 9,343 | ​ |  | 242 | ​ |  | 914 | ​ |  | 1,246 | ​ |  | 15,871
Losses charged off | ​ |  | (70) | ​ |  | — | ​ |  | (43) | ​ |  | (1) | ​ |  | (28) | ​ |  | (3,152) | ​ |  | (3,294)
Recoveries | ​ |  | 183 | ​ |  | 180 | ​ |  | 73 | ​ |  | 204 | ​ |  | 149 | ​ |  | 2,083 | ​ |  | 2,872
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, December 31, 2020 | ​ | $ | 4,536 | ​ | $ | 9,375 | ​ | $ | 33,707 | ​ | $ | 3,521 | ​ | $ | 2,390 | ​ | $ | 2,214 | ​ | $ | 55,743
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ending balance: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Individually evaluated for impairment | ​ | $ | 90 | ​ | $ | — | ​ | $ | 445 | ​ | $ | — | ​ | $ | 14 | ​ | $ | 164 | ​ | $ | 713
Collectively evaluated for impairment | ​ | $ | 4,382 | ​ | $ | 9,282 | ​ | $ | 32,937 | ​ | $ | 3,378 | ​ | $ | 2,331 | ​ | $ | 2,040 | ​ | $ | 54,350
Loans acquired and accounted for under ASC 310-30 | ​ | $ | 64 | ​ | $ | 93 | ​ | $ | 325 | ​ | $ | 143 | ​ | $ | 45 | ​ | $ | 10 | ​ | $ | 680
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loans | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Individually evaluated for impairment | ​ | $ | 3,546 | ​ | $ | — | ​ | $ | 3,438 | ​ | $ | — | ​ | $ | 167 | ​ | $ | 1,897 | ​ | $ | 9,048
Collectively evaluated for impairment | ​ | $ | 655,146 | ​ | $ | 1,021,145 | ​ | $ | 1,550,239 | ​ | $ | 1,266,847 | ​ | $ | 384,734 | ​ | $ | 239,727 | ​ | $ | 5,117,838
Loans acquired and accounted for under ASC 310-30 | ​ | $ | 57,113 | ​ | $ | 6,150 | ​ | $ | 24,613 | ​ | $ | 2,551 | ​ | $ | 2,549 | ​ | $ | 5,667 | ​ | $ | 98,643
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2019
​ | ​ | One- to Four- | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Family | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Residential | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | and | ​ | Other | ​ | Commercial | ​ | Commercial | ​ | Commercial | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Construction |  | Residential |  | Real Estate |  | Construction |  | Business |  | Consumer |  | Total
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for Loan Losses |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Balance, January 1, 2019 | ​ | $ | 3,122 | ​ | $ | 4,713 | ​ | $ | 19,803 | ​ | $ | 3,105 | ​ | $ | 1,568 | ​ | $ | 6,098 | ​ | $ | 38,409
Provision (benefit) charged to expense | ​ |  | 1,625 | ​ |  | 603 | ​ |  | 4,651 | ​ |  | 22 | ​ |  | (309) | ​ |  | (442) | ​ |  | 6,150
Losses charged off | ​ |  | (534) | ​ |  | (189) | ​ |  | (144) | ​ |  | (101) | ​ |  | (371) | ​ |  | (6,723) | ​ |  | (8,062)
Recoveries | ​ |  | 126 | ​ |  | 26 | ​ |  | 24 | ​ |  | 50 | ​ |  | 467 | ​ |  | 3,104 | ​ |  | 3,797
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, December 31, 2019 | ​ | $ | 4,339 | ​ | $ | 5,153 | ​ | $ | 24,334 | ​ | $ | 3,076 | ​ | $ | 1,355 | ​ | $ | 2,037 | ​ | $ | 40,294
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ending balance: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Individually evaluated for impairment | ​ | $ | 198 | ​ | $ | — | ​ | $ | 517 | ​ | $ | — | ​ | $ | 13 | ​ | $ | 201 | ​ | $ | 929
Collectively evaluated for impairment | ​ | $ | 3,973 | ​ | $ | 5,101 | ​ | $ | 23,570 | ​ | $ | 2,940 | ​ | $ | 1,306 | ​ | $ | 1,814 | ​ | $ | 38,704
Loans acquired and accounted for under ASC 310-30 | ​ | $ | 168 | ​ | $ | 52 | ​ | $ | 247 | ​ | $ | 136 | ​ | $ | 36 | ​ | $ | 22 | ​ | $ | 661
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loans | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Individually evaluated for impairment | ​ | $ | 2,960 | ​ | $ | — | ​ | $ | 4,020 | ​ | $ | — | ​ | $ | 1,286 | ​ | $ | 2,001 | ​ | $ | 10,267
Collectively evaluated for impairment | ​ | $ | 554,450 | ​ | $ | 866,006 | ​ | $ | 1,490,152 | ​ | $ | 1,363,292 | ​ | $ | 325,112 | ​ | $ | 315,561 | ​ | $ | 4,914,573
Loans acquired and accounted for under ASC 310-30 | ​ | $ | 74,562 | ​ | $ | 5,334 | ​ | $ | 29,158 | ​ | $ | 3,606 | ​ | $ | 3,356 | ​ | $ | 11,190 | ​ | $ | 127,206
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2018
​ | ​ | One- to Four- | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​
​ | ​ | Family | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​
​ | ​ | Residential | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​
​ | ​ | and | ​ | Other | ​ | Commercial | ​ | Commercial | ​ | Commercial | ​ | ​ | ​ | ​ |  | ​
​ |  | Construction |  | Residential |  | Real Estate |  | Construction |  | Business |  | Consumer |  | Total
​ |  | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for Loan Losses | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, January 1, 2018 | ​ | $ | 2,108 |  | $ | 2,839 |  | $ | 18,639 |  | $ | 1,767 |  | $ | 3,581 |  | $ | 7,558 |  | $ | 36,492
Provision (benefit) charged to expense | ​ |  | 742 | ​ |  | 1,982 | ​ |  | 1,094 | ​ |  | 1,031 | ​ |  | (1,613) | ​ |  | 3,914 |  |  | 7,150
Losses charged off | ​ |  | (62) | ​ |  | (525) | ​ |  | (102) | ​ |  | (87) | ​ |  | (1,155) | ​ |  | (9,425) |  |  | (11,356)
Recoveries | ​ |  | 334 | ​ |  | 417 | ​ |  | 172 | ​ |  | 394 | ​ |  | 755 | ​ |  | 4,051 |  |  | 6,123
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, December 31, 2018 | ​ | $ | 3,122 | ​ | $ | 4,713 | ​ | $ | 19,803 | ​ | $ | 3,105 | ​ | $ | 1,568 | ​ | $ | 6,098 |  | $ | 38,409
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ending balance: | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ |  |  | ​
Individually evaluated for impairment | ​ | $ | 694 | ​ | $ | — | ​ | $ | 613 | ​ | $ | — | ​ | $ | 309 | ​ | $ | 425 |  | $ | 2,041
Collectively evaluated for impairment | ​ | $ | 2,392 | ​ | $ | 4,681 | ​ | $ | 18,958 | ​ | $ | 3,029 | ​ | $ | 1,247 | ​ | $ | 5,640 |  | $ | 35,947
Loans acquired and accounted for under ASC 310-30 | ​ | $ | 36 | ​ | $ | 32 | ​ | $ | 232 | ​ | $ | 76 | ​ | $ | 12 | ​ | $ | 33 |  | $ | 421
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Loans | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ |  |  | ​
Individually evaluated for impairment | ​ | $ | 6,116 | ​ | $ | — | ​ | $ | 3,501 | ​ | $ | 14 | ​ | $ | 1,844 | ​ | $ | 2,464 |  | $ | 13,939
Collectively evaluated for impairment | ​ | $ | 433,209 | ​ | $ | 784,894 | ​ | $ | 1,367,934 | ​ | $ | 1,461,644 | ​ | $ | 334,214 | ​ | $ | 429,766 |  | $ | 4,811,661
Loans acquired and accounted for under ASC 310-30 | ​ | $ | 93,841 | ​ | $ | 12,790 | ​ | $ | 33,620 | ​ | $ | 4,093 | ​ | $ | 4,347 | ​ | $ | 18,960 |  | $ | 167,651
​ The portfolio segments used in the preceding three tables correspond to the loan classes used in all other tables in Note 3 as follows:
| ● | The one- to four-family residential and construction segment includes the one- to four-family residential construction, subdivision construction, owner occupied one- to four-family residential and non-owner occupied one- to four-family residential classes.
| ● | The other residential segment corresponds to the other residential class.
| ● | The commercial real estate segment includes the commercial real estate and industrial revenue bonds classes.
| ● | The commercial construction segment includes the land development and commercial construction classes.
| ● | The commercial business segment corresponds to the commercial business class.
| ● | The consumer segment includes the consumer auto, consumer other and home equity lines of credit classes.
The weighted average interest rate on loans receivable at December 31, 2020 and 2019, was 4.29% and 4.97%, respectively. Loans serviced for others are not included in the accompanying consolidated statements of financial condition. The unpaid principal balance of loans serviced for others at December 31, 2020, was $462.7 million, consisting of $308.4 million of commercial loan participations sold to other financial institutions and $154.3 million of residential mortgage loans sold. The unpaid principal balance of loans serviced for others at December 31, 2019, was $349.9 million, consisting of $283.0 million of commercial loan participations sold to other financial institutions and $66.9 million of residential mortgage loans sold. In addition, available lines of credit on these loans were $46.1 million and $102.1 million at December 31, 2020 and 2019, respectively. A loan is considered impaired, in accordance with the impairment accounting guidance (FASB ASC 310-10-35-16) when, based on current information and events, it is probable the Company will be unable to collect all amounts due from the borrower in accordance with the contractual terms of the loan. Impaired loans include not only nonperforming loans but also loans modified in troubled debt restructurings where concessions have been granted to borrowers experiencing financial difficulties. The following summarizes information regarding impaired loans at and during the years ended December 31, 2020, 2019 and 2018: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Year Ended
​ | ​ | December 31, 2020 | ​ | December 31, 2020
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ |  | ​
​ | ​ | ​ | ​ | ​ | Unpaid | ​ | ​ | ​ | ​ | Investment | ​ | Interest
​ | ​ | Recorded | ​ | Principal | ​ | Specific | ​ | in Impaired | ​ | Income
​ |  | Balance |  | Balance |  | Allowance |  | Loans |  | Recognized
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
One- to four-family residential construction |  | $ | — |  | $ | — |  | $ | — |  | $ | — |  | $ | —
Subdivision construction | ​ |  | 20 | ​ |  | 20 | ​ |  | — | ​ |  | 115 |  | ​ | 3
Land development | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — |  | ​ | —
Commercial construction | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — |  | ​ | —
Owner occupied one- to four-family residential | ​ |  | 3,457 | ​ |  | 3,776 | ​ |  | 90 | ​ |  | 2,999 |  | ​ | 169
Non-owner occupied one- to four-family residential | ​ |  | 69 | ​ |  | 106 | ​ |  | — | ​ |  | 309 |  | ​ | 18
Commercial real estate | ​ |  | 3,438 | ​ |  | 3,472 | ​ |  | 445 | ​ |  | 3,736 |  | ​ | 135
Other residential | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — |  | ​ | —
Commercial business | ​ |  | 166 | ​ |  | 551 | ​ |  | 14 | ​ |  | 800 |  | ​ | 34
Industrial revenue bonds | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — |  | ​ | —
Consumer auto | ​ |  | 865 | ​ |  | 964 | ​ |  | 140 | ​ |  | 932 |  | ​ | 91
Consumer other | ​ |  | 403 | ​ |  | 552 | ​ |  | 19 | ​ |  | 298 |  | ​ | 47
Home equity lines of credit | ​ |  | 630 | ​ |  | 668 | ​ |  | 5 | ​ |  | 550 |  | ​ | 36
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 9,048 | ​ | $ | 10,109 | ​ | $ | 713 | ​ | $ | 9,739 |  | $ | 533
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Year Ended
​ | ​ | December 31, 2019 | ​ | December 31, 2019
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ |  | ​
​ | ​ | ​ | ​ | ​ | Unpaid | ​ | ​ | ​ | ​ | Investment | ​ | Interest
​ | ​ | Recorded | ​ | Principal | ​ | Specific | ​ | in Impaired | ​ | Income
​ |  | Balance |  | Balance |  | Allowance |  | Loans |  | Recognized
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
One- to four-family residential construction | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — |  | $ | —
Subdivision construction | ​ |  | 251 | ​ |  | 251 | ​ |  | 96 | ​ |  | 277 |  | ​ | 9
Land development | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 328 |  | ​ | 101
Commercial construction | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — |  | ​ | —
Owner occupied one- to four-family residential | ​ |  | 2,300 | ​ |  | 2,423 | ​ |  | 82 | ​ |  | 2,598 |  | ​ | 131
Non-owner occupied one- to four-family residential | ​ |  | 409 | ​ |  | 574 | ​ |  | 20 | ​ |  | 954 |  | ​ | 43
Commercial real estate | ​ |  | 4,020 | ​ |  | 4,049 | ​ |  | 517 | ​ |  | 4,940 |  | ​ | 264
Other residential | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — |  | ​ | —
Commercial business | ​ |  | 1,286 | ​ |  | 1,771 | ​ |  | 13 | ​ |  | 1,517 |  | ​ | 81
Industrial revenue bonds | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — |  | ​ | —
Consumer auto | ​ |  | 1,117 | ​ |  | 1,334 | ​ |  | 181 | ​ |  | 1,128 |  | ​ | 125
Consumer other | ​ |  | 356 | ​ |  | 485 | ​ |  | 16 | ​ |  | 383 |  | ​ | 48
Home equity lines of credit | ​ |  | 528 | ​ |  | 548 | ​ |  | 4 | ​ |  | 362 |  | ​ | 37
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 10,267 | ​ | $ | 11,435 | ​ | $ | 929 | ​ | $ | 12,487 |  | $ | 839
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Year Ended
​ | ​ | December 31, 2018 | ​ | December 31, 2018
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ |  | ​
​ | ​ | ​ | ​ | ​ | Unpaid | ​ | ​ | ​ | ​ | Investment | ​ | Interest
​ | ​ | Recorded | ​ | Principal | ​ | Specific | ​ | in Impaired | ​ | Income
​ |  | Balance |  | Balance |  | Allowance |  | Loans |  | Recognized
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
One- to four-family residential construction | ​ | $ | — |  | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | —
Subdivision construction | ​ |  | 318 | ​ |  | 318 | ​ |  | 105 | ​ |  | 321 |  | ​ | 17
Land development | ​ |  | 14 | ​ |  | 18 | ​ |  | — | ​ |  | 14 |  | ​ | 1
Commercial construction | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — |  | ​ | —
Owner occupied one- to four-family residential | ​ |  | 3,576 | ​ |  | 3,926 | ​ |  | 285 | ​ |  | 3,406 |  | ​ | 197
Non-owner occupied one- to four-family residential | ​ |  | 2,222 | ​ |  | 2,519 | ​ |  | 304 | ​ |  | 2,870 |  | ​ | 158
Commercial real estate | ​ |  | 3,501 | ​ |  | 3,665 | ​ |  | 613 | ​ |  | 6,216 |  | ​ | 337
Other residential | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 1,026 |  | ​ | 20
Commercial business | ​ |  | 1,844 | ​ |  | 2,207 | ​ |  | 309 | ​ |  | 2,932 |  | ​ | 362
Industrial revenue bonds | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — |  | ​ | —
Consumer auto | ​ |  | 1,874 | ​ |  | 2,114 | ​ |  | 336 | ​ |  | 2,069 |  | ​ | 167
Consumer other | ​ |  | 479 | ​ |  | 684 | ​ |  | 72 | ​ |  | 738 |  | ​ | 59
Home equity lines of credit | ​ |  | 111 | ​ |  | 128 | ​ |  | 17 | ​ |  | 412 |  | ​ | 28
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 13,939 | ​ | $ | 15,579 | ​ | $ | 2,041 | ​ | $ | 20,004 |  | $ | 1,346
​ At December 31, 2020, $4.8 million of impaired loans had specific valuation allowances totaling $713,000. At December 31, 2019, $5.2 million of impaired loans had specific valuation allowances totaling $929,000. At December 31, 2018, $8.4 million of impaired loans had specific valuation allowances totaling $2.0 million. For impaired loans which were non-accruing, interest of approximately $579,000, $761,000 and $1.0 million would have been recognized on an accrual basis during the years ended December 31, 2020, 2019 and 2018, respectively. Included in certain loan categories in the impaired loans are troubled debt restructurings that were classified as impaired. Troubled debt restructurings are loans that are modified by granting concessions to borrowers experiencing financial difficulties. These concessions could include a reduction in the interest rate on the loan, payment extensions, forgiveness of principal, forbearance or other actions intended to maximize collection. The types of concessions made are factored into the estimation of the allowance for loan losses for troubled debt restructurings primarily using a discounted cash flows or collateral adequacy approach. The following table presents newly restructured loans during the years ended December 31, 2020, 2019 and 2018 by type of modification: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2020
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Total
​ |  | Interest Only |  | Term |  | Combination |  | Modification
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential one-to-four family | ​ | $ | — | ​ | $ | — | ​ | $ | 1,030 | ​ | $ | 1,030
Commercial real estate | ​ |  | — | ​ |  | — | ​ |  | 559 | ​ |  | 559
Commercial business | ​ |  | — | ​ |  | — | ​ |  | 22 | ​ |  | 22
Consumer | ​ |  | — | ​ |  | 16 | ​ |  | 1,951 | ​ |  | 1,967
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | — | ​ | $ | 16 | ​ | $ | 3,562 | ​ | $ | 3,578
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2019
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Total
​ |  | Interest Only |  | Term |  | Combination |  | Modification
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Consumer | ​ | $ | — | ​ | $ | 136 | ​ | $ | — | ​ | $ | 136
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | — | ​ | $ | 136 | ​ | $ | — | ​ | $ | 136
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2018
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Total
​ |  | Interest Only |  | Term |  | Combination |  | Modification
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential one-to-four family | ​ | $ | 1,348 | ​ | $ | — | ​ | $ | — | ​ | $ | 1,348
Construction and land development | ​ | ​ | — | ​ | ​ | 31 | ​ | ​ | — | ​ | ​ | 31
Commercial construction | ​ |  | — | ​ |  | — | ​ |  | 106 | ​ |  | 106
Consumer | ​ |  | — | ​ |  | 535 | ​ |  | — | ​ |  | 535
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | $ | 1,348 | ​ | $ | 566 | ​ | $ | 106 | ​ | $ | 2,020
​ At December 31, 2020, the Company had $3.3 million of loans that were modified in troubled debt restructurings and impaired, as follows: $20,000 of construction and land development loans, $1.9 million of single family residential mortgage loans, $646,000 of commercial real estate loans, $127,000 of commercial business loans and $629,000 of consumer loans. Of the total troubled debt restructurings at December 31, 2020, $2.4 million were accruing interest and $1.6 million were classified as substandard using the Company's internal grading system which is described below. The Company had no troubled debt restructurings which were modified in the previous 12 months and subsequently defaulted during the year ended December 31, 2020. When loans modified as troubled debt restructuring have subsequent payment defaults, the defaults are factored into the determination of the allowance for loan losses to ensure specific valuation allowances reflect amounts considered uncollectible. At December 31, 2019, the Company had $1.9 million of loans that were modified in troubled debt restructurings and impaired, as follows: $251,000 of construction and land development loans, $768,000 of single family residential mortgage loans, $412,000 of commercial real estate loans, $156,000 of commercial business loans and $343,000 of consumer loans. Of the total troubled debt restructurings at December 31, 2019, $1.4 million were accruing interest and $562,000 were classified as substandard using the Company’s internal grading system. During the year ended December 31, 2020, borrowers with loans designated as troubled debt restructurings totaling $372,000, all of which consisted of residential one-to-four family loans, met the criteria for placement back on accrual status. This criteria generally includes a minimum of six months of consistent and timely payment performance under original or modified terms. At December 31, 2020, the Company had remaining 65 modified commercial loans with an aggregate principal balance outstanding of $233 million and 581 modified consumer and mortgage loans with an aggregate principal balance outstanding of $18 million. The loan modifications are within the guidance provided by the CARES Act (and its amending legislation), the federal banking regulatory agencies, the Securities and Exchange Commission and the Financial Accounting Standards Board; therefore, they are not considered troubled debt restructurings. The Company reviews the credit quality of its loan portfolio using an internal grading system that classifies loans as “Satisfactory,” “Watch,” “Special Mention,” “Substandard” and “Doubtful.” Loans classified as watch are being monitored because of indications of potential weaknesses or deficiencies that may require future classification as special mention or substandard. Special mention loans possess potential weaknesses that deserve management’s close attention but do not expose the Bank to a degree of risk that warrants substandard classification. Substandard loans are characterized by the distinct possibility that the Bank will sustain some loss if certain deficiencies are not corrected. Doubtful loans are those having all the weaknesses inherent to those classified Substandard with the added characteristics that the weaknesses make collection or liquidation in full, on the basis of currently existing facts, conditions and values, highly questionable and improbable. Loans not meeting any of the criteria previously described are considered satisfactory. The FDIC-assisted acquired loans are evaluated using this internal grading system. These loans are accounted for in pools. Minimal adverse classification in these acquired loan pools was identified as of December 31, 2020 and 2019 respectively. See Note 4 for further discussion of the acquired loan pools and termination of the loss sharing agreements. The Company evaluates the loan risk internal grading system definitions and allowance for loan loss methodology on an ongoing basis. The general component of the allowance for loan losses is affected by several factors, including, but not limited to, average historical losses, average life of the loans, current composition of the loan portfolio, current and expected economic conditions, collateral values and internal risk ratings. Management considers all these factors in determining the adequacy of the Company’s allowance for loan losses. No significant changes were made to the loan risk grading system definitions and allowance for loan loss methodology during the past year. The loan grading system is presented by loan class below: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Special | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Satisfactory |  | Watch |  | Mention |  | Substandard |  | Doubtful |  | Total
​ |  | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
One- to four-family residential construction | ​ | $ | 41,428 | ​ | $ | 1,365 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 42,793
Subdivision construction | ​ |  | 30,874 | ​ |  | — | ​ |  | — | ​ |  | 20 | ​ |  | — | ​ |  | 30,894
Land development | ​ |  | 54,010 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 54,010
Commercial construction | ​ |  | 1,212,837 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 1,212,837
Owner occupied one- to-four-family residential | ​ |  | 467,855 | ​ |  | 216 | ​ |  | — | ​ |  | 2,365 | ​ |  | — | ​ |  | 470,436
Non-owner occupied one-to-four-family residential | ​ |  | 114,176 | ​ |  | 324 | ​ |  | — | ​ |  | 69 | ​ |  | — | ​ |  | 114,569
Commercial real estate | ​ |  | 1,498,031 | ​ |  | 52,208 | ​ |  | — | ​ |  | 3,438 | ​ |  | — | ​ |  | 1,553,677
Other residential | ​ |  | 1,017,648 | ​ |  | 3,497 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 1,021,145
Commercial business | ​ |  | 363,681 | ​ |  | 7,102 | ​ |  | — | ​ |  | 115 | ​ |  | — | ​ |  | 370,898
Industrial revenue bonds | ​ |  | 14,003 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 14,003
Consumer auto | ​ |  | 85,657 | ​ |  | 5 | ​ |  | — | ​ |  | 511 | ​ |  | — | ​ |  | 86,173
Consumer other | ​ |  | 40,514 | ​ |  | 2 | ​ |  | — | ​ |  | 246 | ​ |  | — | ​ |  | 40,762
Home equity lines of credit | ​ |  | 114,049 | ​ |  | 39 | ​ |  | — | ​ |  | 601 | ​ |  | — | ​ |  | 114,689
Loans acquired and accounted for under ASC 310-30, net of discounts | ​ |  | 98,633 | ​ |  | — | ​ |  | — | ​ |  | 10 | ​ |  | — | ​ |  | 98,643
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 5,153,396 | ​ | $ | 64,758 | ​ | $ | — | ​ | $ | 7,375 | ​ | $ | — | ​ | $ | 5,225,529
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2019
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Special | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Satisfactory |  | Watch |  | Mention |  | Substandard |  | Doubtful |  | Total
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
One- to four-family residential construction | ​ | $ | 33,963 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 33,963
Subdivision construction | ​ |  | 16,061 | ​ |  | 27 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 16,088
Land development | ​ |  | 40,431 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 40,431
Commercial construction | ​ |  | 1,322,861 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 1,322,861
Owner occupied one- to-four-family residential | ​ |  | 385,001 | ​ |  | 26 | ​ |  | — | ​ |  | 1,989 | ​ |  | — | ​ |  | 387,016
Non-owner occupied one-to-four-family residential | ​ |  | 119,743 | ​ |  | 419 | ​ |  | — | ​ |  | 181 | ​ |  | — | ​ |  | 120,343
Commercial real estate | ​ |  | 1,458,400 | ​ |  | 32,063 | ​ |  | — | ​ |  | 3,709 | ​ |  | — | ​ |  | 1,494,172
Other residential | ​ |  | 866,006 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 866,006
Commercial business | ​ |  | 307,322 | ​ |  | 4,651 | ​ |  | — | ​ |  | 1,236 | ​ |  | — | ​ |  | 313,209
Industrial revenue bonds | ​ |  | 13,189 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 13,189
Consumer auto | ​ |  | 150,874 | ​ |  | 47 | ​ |  | — | ​ |  | 933 | ​ |  | — | ​ |  | 151,854
Consumer other | ​ |  | 46,294 | ​ |  | 92 | ​ |  | — | ​ |  | 334 | ​ |  | — | ​ |  | 46,720
Home equity lines of credit | ​ |  | 118,428 | ​ |  | 43 | ​ |  | — | ​ |  | 517 | ​ |  | — | ​ |  | 118,988
Loans acquired and accounted for under ASC 310-30, net of discounts | ​ |  | 127,192 | ​ |  | — | ​ |  | — | ​ |  | 14 | ​ |  | — | ​ |  | 127,206
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total | ​ | $ | 5,005,765 | ​ | $ | 37,368 | ​ | $ | — | ​ | $ | 8,913 | ​ | $ | — | ​ | $ | 5,052,046
​ Certain of the Bank’s real estate loans are pledged as collateral for borrowings as set forth in Notes 9 and 11. Certain directors and executive officers of the Company and the Bank, and their related interests, are customers of and had transactions with the Bank in the ordinary course of business. Except for the interest rates on loans secured by personal residences, in the opinion of management, all loans included in such transactions were made on substantially the same terms as those prevailing at the time for comparable transactions with unrelated parties. Generally, residential first mortgage loans and home equity lines of credit to all employees and directors have been granted at interest rates equal to the Bank’s cost of funds, subject to annual adjustments in the case of residential first mortgage loans and monthly adjustments in the case of home equity lines of credit. At December 31, 2020 and 2019, loans outstanding to these directors and executive officers, and their related interests, are summarized as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2020 |  | 2019
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, beginning of year | ​ | $ | 15,240 | ​ | $ | 29,017
New loans | ​ |  | 901 | ​ |  | 15,062
Payments | ​ |  | (2,673) | ​ |  | (28,839)
​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, end of year | ​ | $ | 13,468 | ​ | $ | 15,240
​

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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