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CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Interest income |  |  |
Loans, including fees | $ 61,014 | $ 55,565 | $ 47,845
Securities |  |  |
Taxable | 5,811 | 5,170 | 6,317
Nontaxable | 3,679 | 3,231 | 1,529
Federal funds sold and interest-bearing deposits | 1,278 | 742 | 391
Total interest income | 71,782 | 64,708 | 56,082
Interest expense |  |  |
Deposits | 10,604 | 9,050 | 6,524
FHLB advances and federal funds purchased | 472 | 350 | 699
Subordinated debentures | 724 | 882 | 603
Other borrowed money | 352 | 586 | 497
Total interest expense | 12,152 | 10,868 | 8,323
Net interest income | 59,630 | 53,840 | 47,759
Provision for loan losses | 2,850 | 3,640 | 2,175
Net interest income after provision for loan losses | 56,780 | 50,200 | 45,584
Noninterest income |  |  |
Service charges | 3,746 | 3,530 | 3,493
Net realized gain on securities transactions | 167 | 82 | 77
Net realized gain on sales of loans | 1,981 | 1,718 | 1,053
Other operating income | 8,385 | 7,686 | 6,860
Total noninterest income | 14,279 | 13,016 | 11,483
Noninterest expense |  |  |
Employee compensation and benefits | 27,078 | 25,611 | 22,469
Occupancy expenses | 7,400 | 6,870 | 6,468
Other operating expenses | 13,904 | 13,899 | 13,657
Total noninterest expense | 48,382 | 46,380 | 42,594
Income before income taxes | 22,677 | 16,836 | 14,473
Income tax provision | 8,238 | 4,715 | 4,362
Net earnings | $ 14,439 | $ 12,121 | $ 10,111
Basic earnings per share (in USD per share) | $ 1.41 | $ 1.35 | $ 1.15
Diluted earnings per share (in USD per share) | $ 1.40 | $ 1.35 | $ 1.15

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- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_ProvisionForLoanAndLeaseLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration