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Selected Condensed Quarterly Financial Data (Unaudited) (Tables)
12 Months Ended
Dec. 31, 2017
Selected Condensed Quarterly Financial Data (Unaudited) [Abstract]  
Summary of selected quarterly financial information
 
2017
For the quarters ended
(dollars in thousands, except share data)     March 31     June 30     September 30     December 31
Interest income$13,95914,93115,95516,364
Interest expense2,3522,5792,6462,756
Net interest income11,60712,35213,30913,608
Provision for loan losses500500500500
Noninterest income2,0512,5632,5422,181
Noninterest expenses8,3608,7638,8068,623
Income before income tax expense4,7985,6526,5456,666
Income tax expense1,6872,0482,2954,586
Net income available to common shareholders$3,1113,6044,2502,080
Earnings per common share
Basic$0.480.520.580.28
Diluted$0.450.490.550.27
Weighted average common shares outstanding
Basic6,437,2316,986,9487,281,5947,304,478
Diluted6,829,5907,366,2087,668,4767,696,684

 
2016
For the quarters ended
(dollars in thousands, except share data)     March 31     June 30     September 30     December 31
Interest income$12,32912,50312,91213,447
Interest expense2,0221,9902,0322,148
Net interest income10,30710,51310,88011,299
Provision for loan losses625575825275
Noninterest income2,5593,1463,0172,124
Noninterest expenses7,5177,8537,8008,006
Income before income tax expense4,7245,2315,2725,142
Income tax expense1,7181,9251,8391,851
Net income available to common shareholders$3,0063,3063,4333,291
Earnings per common share
Basic$0.480.530.540.52
Diluted$0.450.490.510.49
Weighted average common shares outstanding
Basic6,272,8476,301,8536,322,0736,375,842
Diluted6,634,4326,702,8206,740,7516,775,729