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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Impaired Loans and Leases) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Recorded investment      
With no impairment reserve recorded $ 10,802 $ 16,975 $ 11,345
With impairment reserve recorded 14,679 9,746 14,566
Total 25,481 26,721 25,911
Unpaid principal balance      
With no impairment reserve recorded 16,510 21,671 14,722
With impairment reserve recorded 16,038 11,694 14,572
Total 32,548 33,365 29,294
Impairment reserve      
Impairment reserve 4,396 4,491 5,599
Average recorded investment      
With no impairment reserve recorded 21,108 18,624 13,371
With impairment reserve recorded 5,323 14,540 9,615
Total 26,431 33,164 22,986
Foregone interest income      
With no impairment reserve recorded 2,200 1,898 838
With impairment reserve recorded 1,278 797 779
Total 3,478 2,695 1,617
Interest income recognized      
With no impairment reserve recorded 1,304 454 614
With impairment reserve recorded 0 0 0
Total 1,304 454 614
Net foregone interest income      
With no impairment reserve recorded 896 1,444 224
With impairment reserve recorded 1,278 797 779
Total 2,174 2,241 1,003
Commercial real estate — owner occupied      
Recorded investment      
With no impairment reserve recorded 1,273 7,077 1,788
With impairment reserve recorded 4,390 0 499
Total 5,663 7,077 2,287
Unpaid principal balance      
With no impairment reserve recorded 1,273 7,077 1,788
With impairment reserve recorded 5,749 0 499
Total 7,022 7,077 2,287
Impairment reserve      
Impairment reserve 675 0 70
Average recorded investment      
With no impairment reserve recorded 6,638 5,549 3,577
With impairment reserve recorded 635 0 111
Total 7,273 5,549 3,688
Foregone interest income      
With no impairment reserve recorded 756 613 328
With impairment reserve recorded 182 0 28
Total 938 613 356
Interest income recognized      
With no impairment reserve recorded 197 0 118
With impairment reserve recorded 0 0 0
Total 197 0 118
Net foregone interest income      
With no impairment reserve recorded 559 613 210
With impairment reserve recorded 182 0 28
Total 741 613 238
Commercial real estate — non-owner occupied      
Recorded investment      
With no impairment reserve recorded 31 34 1,609
With impairment reserve recorded 0 0 0
Total 31 34 1,609
Unpaid principal balance      
With no impairment reserve recorded 72 75 1,647
With impairment reserve recorded 0 0 0
Total 72 75 1,647
Impairment reserve      
Impairment reserve 0 0 0
Average recorded investment      
With no impairment reserve recorded 33 1,830 1,318
With impairment reserve recorded 0 0 0
Total 33 1,830 1,318
Foregone interest income      
With no impairment reserve recorded 2 97 91
With impairment reserve recorded 0 0 0
Total 2 97 91
Interest income recognized      
With no impairment reserve recorded 0 226 79
With impairment reserve recorded 0 0 0
Total 0 226 79
Net foregone interest income      
With no impairment reserve recorded 2 (129) 12
With impairment reserve recorded 0 0 0
Total 2 (129) 12
Land development      
Recorded investment      
With no impairment reserve recorded 2,213 2,627 3,440
With impairment reserve recorded 0 0 0
Total 2,213 2,627 3,440
Unpaid principal balance      
With no impairment reserve recorded 6,510 5,297 6,111
With impairment reserve recorded 0 0 0
Total 6,510 5,297 6,111
Impairment reserve      
Impairment reserve 0 0 0
Average recorded investment      
With no impairment reserve recorded 2,366 3,092 3,898
With impairment reserve recorded 0 0 0
Total 2,366 3,092 3,898
Foregone interest income      
With no impairment reserve recorded 68 84 107
With impairment reserve recorded 0 0 0
Total 68 84 107
Interest income recognized      
With no impairment reserve recorded 0 0 0
With impairment reserve recorded 0 0 0
Total 0 0 0
Net foregone interest income      
With no impairment reserve recorded 68 84 107
With impairment reserve recorded 0 0 0
Total 68 84 107
Construction      
Recorded investment      
With no impairment reserve recorded 0 0 436
With impairment reserve recorded 0 2,872 2,482
Total 0 2,872 2,918
Unpaid principal balance      
With no impairment reserve recorded 0 0 438
With impairment reserve recorded 0 2,872 2,482
Total 0 2,872 2,920
Impairment reserve      
Impairment reserve 0 415 1,790
Average recorded investment      
With no impairment reserve recorded 2,148 2,000 291
With impairment reserve recorded 0 2,252 834
Total 2,148 4,252 1,125
Foregone interest income      
With no impairment reserve recorded 219 134 20
With impairment reserve recorded 0 158 45
Total 219 292 65
Interest income recognized      
With no impairment reserve recorded 0 214 0
With impairment reserve recorded 0 0 0
Total 0 214 0
Net foregone interest income      
With no impairment reserve recorded 219 (80) 20
With impairment reserve recorded 0 158 45
Total 219 78 65
Multi-family      
Recorded investment      
With no impairment reserve recorded 0 0 0
With impairment reserve recorded 0 0 0
Total 0 0 0
Unpaid principal balance      
With no impairment reserve recorded 0 0 0
With impairment reserve recorded 0 0 0
Total 0 0 0
Impairment reserve      
Impairment reserve 0 0 0
Average recorded investment      
With no impairment reserve recorded 0 1 0
With impairment reserve recorded 0 0 0
Total 0 1 0
Foregone interest income      
With no impairment reserve recorded 0 0 1
With impairment reserve recorded 0 0 0
Total 0 0 1
Interest income recognized      
With no impairment reserve recorded 0 0 134
With impairment reserve recorded 0 0 0
Total 0 0 134
Net foregone interest income      
With no impairment reserve recorded 0 0 (133)
With impairment reserve recorded 0 0 0
Total 0 0 (133)
1-4 family      
Recorded investment      
With no impairment reserve recorded 178 1,423 2,379
With impairment reserve recorded 0 0 193
Total 178 1,423 2,572
Unpaid principal balance      
With no impairment reserve recorded 183 1,706 2,379
With impairment reserve recorded 0 0 199
Total 183 1,706 2,578
Impairment reserve      
Impairment reserve 0 0 39
Average recorded investment      
With no impairment reserve recorded 808 2,146 2,755
With impairment reserve recorded 0 0 203
Total 808 2,146 2,958
Foregone interest income      
With no impairment reserve recorded 42 53 125
With impairment reserve recorded 0 0 5
Total 42 53 130
Interest income recognized      
With no impairment reserve recorded 81 7 94
With impairment reserve recorded 0 0 0
Total 81 7 94
Net foregone interest income      
With no impairment reserve recorded (39) 46 31
With impairment reserve recorded 0 0 5
Total (39) 46 36
Commercial and industrial      
Recorded investment      
With no impairment reserve recorded 6,828 5,465 1,307
With impairment reserve recorded 10,278 6,865 11,166
Total 17,106 12,330 12,473
Unpaid principal balance      
With no impairment reserve recorded 7,527 6,502 1,307
With impairment reserve recorded 10,278 8,813 11,166
Total 17,805 15,315 12,473
Impairment reserve      
Impairment reserve 3,710 4,067 3,700
Average recorded investment      
With no impairment reserve recorded 8,809 3,634 709
With impairment reserve recorded 4,687 12,288 8,448
Total 13,496 15,922 9,157
Foregone interest income      
With no impairment reserve recorded 1,058 858 79
With impairment reserve recorded 1,096 639 701
Total 2,154 1,497 780
Interest income recognized      
With no impairment reserve recorded 980 7 62
With impairment reserve recorded 0 0 0
Total 980 7 62
Net foregone interest income      
With no impairment reserve recorded 78 851 17
With impairment reserve recorded 1,096 639 701
Total 1,174 1,490 718
Direct financing leases, net      
Recorded investment      
With no impairment reserve recorded 0 0 0
With impairment reserve recorded 0 0 0
Total 0 0 0
Unpaid principal balance      
With no impairment reserve recorded 0 0 0
With impairment reserve recorded 0 0 0
Total 0 0 0
Impairment reserve      
Impairment reserve 0 0 0
Average recorded investment      
With no impairment reserve recorded 0 0 6
With impairment reserve recorded 0 0 0
Total 0 0 6
Foregone interest income      
With no impairment reserve recorded 0 0 0
With impairment reserve recorded 0 0 0
Total 0 0 0
Interest income recognized      
With no impairment reserve recorded 0 0 0
With impairment reserve recorded 0 0 0
Total 0 0 0
Net foregone interest income      
With no impairment reserve recorded 0 0 0
With impairment reserve recorded 0 0 0
Total 0 0 0
Home equity and second mortgages      
Recorded investment      
With no impairment reserve recorded 0 4 8
With impairment reserve recorded 0 0 0
Total 0 4 8
Unpaid principal balance      
With no impairment reserve recorded 0 3 8
With impairment reserve recorded 0 0 0
Total 0 3 8
Impairment reserve      
Impairment reserve 0 0 0
Average recorded investment      
With no impairment reserve recorded 1 7 307
With impairment reserve recorded 0 0 0
Total 1 7 307
Foregone interest income      
With no impairment reserve recorded 0 0 16
With impairment reserve recorded 0 0 0
Total 0 0 16
Interest income recognized      
With no impairment reserve recorded 46 0 127
With impairment reserve recorded 0 0 0
Total 46 0 127
Net foregone interest income      
With no impairment reserve recorded (46) 0 (111)
With impairment reserve recorded 0 0 0
Total (46) 0 (111)
Other      
Recorded investment      
With no impairment reserve recorded 279 345 378
With impairment reserve recorded 11 9 226
Total 290 354 604
Unpaid principal balance      
With no impairment reserve recorded 945 1,011 1,044
With impairment reserve recorded 11 9 226
Total 956 1,020 1,270
Impairment reserve      
Impairment reserve 11 9 0
Average recorded investment      
With no impairment reserve recorded 305 365 510
With impairment reserve recorded 1 0 19
Total 306 365 529
Foregone interest income      
With no impairment reserve recorded 55 59 71
With impairment reserve recorded 0 0 0
Total 55 59 71
Interest income recognized      
With no impairment reserve recorded 0 0 0
With impairment reserve recorded 0 0 0
Total 0 0 0
Net foregone interest income      
With no impairment reserve recorded 55 59 71
With impairment reserve recorded 0 0 0
Total $ 55 $ 59 $ 71