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, 2016
Dec. 31, 2015
Dec. 31, 2014
Recorded investment      
With no impairment reserve recorded $ 14,033 $ 15,175 $ 11,270
With impairment reserve recorded 11,878 8,858 525
Total 25,911 24,033 11,795
Unpaid principal balance      
With no impairment reserve recorded 17,410 19,026 15,623
With impairment reserve recorded 11,884 8,863 565
Total 29,294 27,889 16,188
Impairment reserve      
Impairment reserve 5,599 1,113 290
Average recorded investment      
With no impairment reserve recorded 13,599 9,721 13,926
With impairment reserve recorded 9,387 1,722 548
Total 22,986 11,443 14,474
Foregone interest income      
With no impairment reserve recorded 902 597 843
With impairment reserve recorded 715 153 27
Total 1,617 750 870
Interest income recognized      
With no impairment reserve recorded 614 85 740
With impairment reserve recorded 0 2 0
Total 614 87 740
Net foregone interest income      
With no impairment reserve recorded 288 512 103
With impairment reserve recorded 715 151 27
Total 1,003 663 130
Commercial real estate — owner occupied      
Recorded investment      
With no impairment reserve recorded 1,788 2,164 577
With impairment reserve recorded 499 814 0
Total 2,287 2,978 577
Unpaid principal balance      
With no impairment reserve recorded 1,788 2,164 577
With impairment reserve recorded 499 814 0
Total 2,287 2,978 577
Impairment reserve      
Impairment reserve 70 20 0
Average recorded investment      
With no impairment reserve recorded 3,577 712 484
With impairment reserve recorded 111 215 0
Total 3,688 927 484
Foregone interest income      
With no impairment reserve recorded 328 53 30
With impairment reserve recorded 28 7 0
Total 356 60 30
Interest income recognized      
With no impairment reserve recorded 118 12 79
With impairment reserve recorded 0 2 0
Total 118 14 79
Net foregone interest income      
With no impairment reserve recorded 210 41 (49)
With impairment reserve recorded 28 5 0
Total 238 46 (49)
Commercial real estate — non-owner occupied      
Recorded investment      
With no impairment reserve recorded 1,609 2,314 921
With impairment reserve recorded 0 0 49
Total 1,609 2,314 970
Unpaid principal balance      
With no impairment reserve recorded 1,647 2,355 921
With impairment reserve recorded 0 0 89
Total 1,647 2,355 1,010
Impairment reserve      
Impairment reserve 0 0 49
Average recorded investment      
With no impairment reserve recorded 1,318 962 349
With impairment reserve recorded 0 0 52
Total 1,318 962 401
Foregone interest income      
With no impairment reserve recorded 91 25 22
With impairment reserve recorded 0 0 4
Total 91 25 26
Interest income recognized      
With no impairment reserve recorded 79 0 0
With impairment reserve recorded 0 0 0
Total 79 0 0
Net foregone interest income      
With no impairment reserve recorded 12 25 22
With impairment reserve recorded 0 0 4
Total 12 25 26
Land development      
Recorded investment      
With no impairment reserve recorded 3,440 4,413 4,962
With impairment reserve recorded 0 0 0
Total 3,440 4,413 4,962
Unpaid principal balance      
With no impairment reserve recorded 6,111 7,083 7,633
With impairment reserve recorded 0 0 0
Total 6,111 7,083 7,633
Impairment reserve      
Impairment reserve 0 0 0
Average recorded investment      
With no impairment reserve recorded 3,898 4,333 5,253
With impairment reserve recorded 0 0 0
Total 3,898 4,333 5,253
Foregone interest income      
With no impairment reserve recorded 107 133 155
With impairment reserve recorded 0 0 0
Total 107 133 155
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 107 133 155
With impairment reserve recorded 0 0 0
Total 107 133 155
Construction      
Recorded investment      
With no impairment reserve recorded 436 120 195
With impairment reserve recorded 2,482 397 0
Total 2,918 517 195
Unpaid principal balance      
With no impairment reserve recorded 438 120 195
With impairment reserve recorded 2,482 397 0
Total 2,920 517 195
Impairment reserve      
Impairment reserve 1,790 48 0
Average recorded investment      
With no impairment reserve recorded 291 474 32
With impairment reserve recorded 834 34 0
Total 1,125 508 32
Foregone interest income      
With no impairment reserve recorded 20 0 0
With impairment reserve recorded 45 0 0
Total 65 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 20 0 0
With impairment reserve recorded 45 0 0
Total 65 0 0
Multi-family      
Recorded investment      
With no impairment reserve recorded 0 2 17
With impairment reserve recorded 0 0 0
Total 0 2 17
Unpaid principal balance      
With no impairment reserve recorded 0 369 384
With impairment reserve recorded 0 0 0
Total 0 369 384
Impairment reserve      
Impairment reserve 0 0 0
Average recorded investment      
With no impairment reserve recorded 0 10 24
With impairment reserve recorded 0 0 0
Total 0 10 24
Foregone interest income      
With no impairment reserve recorded 1 27 53
With impairment reserve recorded 0 0 0
Total 1 27 53
Interest income recognized      
With no impairment reserve recorded 134 0 0
With impairment reserve recorded 0 0 0
Total 134 0 0
Net foregone interest income      
With no impairment reserve recorded (133) 27 53
With impairment reserve recorded 0 0 0
Total (133) 27 53
1-4 family      
Recorded investment      
With no impairment reserve recorded 2,379 2,423 1,181
With impairment reserve recorded 193 945 390
Total 2,572 3,368 1,571
Unpaid principal balance      
With no impairment reserve recorded 2,379 2,486 1,218
With impairment reserve recorded 199 950 390
Total 2,578 3,436 1,608
Impairment reserve      
Impairment reserve 39 173 155
Average recorded investment      
With no impairment reserve recorded 2,755 1,604 380
With impairment reserve recorded 203 605 405
Total 2,958 2,209 785
Foregone interest income      
With no impairment reserve recorded 125 82 15
With impairment reserve recorded 5 34 18
Total 130 116 33
Interest income recognized      
With no impairment reserve recorded 94 4 12
With impairment reserve recorded 0 0 0
Total 94 4 12
Net foregone interest income      
With no impairment reserve recorded 31 78 3
With impairment reserve recorded 5 34 18
Total 36 112 21
Commercial and industrial      
Recorded investment      
With no impairment reserve recorded 3,769 2,546 2,316
With impairment reserve recorded 8,704 6,603 33
Total 12,473 9,149 2,349
Unpaid principal balance      
With no impairment reserve recorded 3,769 2,590 2,926
With impairment reserve recorded 8,704 6,603 33
Total 12,473 9,193 2,959
Impairment reserve      
Impairment reserve 3,700 847 33
Average recorded investment      
With no impairment reserve recorded 918 544 6,141
With impairment reserve recorded 8,239 810 34
Total 9,157 1,354 6,175
Foregone interest income      
With no impairment reserve recorded 143 172 463
With impairment reserve recorded 637 102 0
Total 780 274 463
Interest income recognized      
With no impairment reserve recorded 62 6 649
With impairment reserve recorded 0 0 0
Total 62 6 649
Net foregone interest income      
With no impairment reserve recorded 81 166 (186)
With impairment reserve recorded 637 102 0
Total 718 268 (186)
Direct financing leases, net      
Recorded investment      
With no impairment reserve recorded 0 38 0
With impairment reserve recorded 0 0 0
Total 0 38 0
Unpaid principal balance      
With no impairment reserve recorded 0 38 0
With impairment reserve recorded 0 0 0
Total 0 38 0
Impairment reserve      
Impairment reserve 0 0 0
Average recorded investment      
With no impairment reserve recorded 6 4 0
With impairment reserve recorded 0 0 0
Total 6 4 0
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 8 500 380
With impairment reserve recorded 0 99 53
Total 8 599 433
Unpaid principal balance      
With no impairment reserve recorded 8 500 380
With impairment reserve recorded 0 99 53
Total 8 599 433
Impairment reserve      
Impairment reserve 0 25 53
Average recorded investment      
With no impairment reserve recorded 307 390 495
With impairment reserve recorded 0 58 57
Total 307 448 552
Foregone interest income      
With no impairment reserve recorded 16 23 18
With impairment reserve recorded 0 10 5
Total 16 33 23
Interest income recognized      
With no impairment reserve recorded 127 63 0
With impairment reserve recorded 0 0 0
Total 127 63 0
Net foregone interest income      
With no impairment reserve recorded (111) (40) 18
With impairment reserve recorded 0 10 5
Total (111) (30) 23
Other      
Recorded investment      
With no impairment reserve recorded 604 655 721
With impairment reserve recorded 0 0 0
Total 604 655 721
Unpaid principal balance      
With no impairment reserve recorded 1,270 1,321 1,389
With impairment reserve recorded 0 0 0
Total 1,270 1,321 1,389
Impairment reserve      
Impairment reserve 0 0 0
Average recorded investment      
With no impairment reserve recorded 529 688 768
With impairment reserve recorded 0 0 0
Total 529 688 768
Foregone interest income      
With no impairment reserve recorded 71 82 87
With impairment reserve recorded 0 0 0
Total 71 82 87
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 71 82 87
With impairment reserve recorded 0 0 0
Total $ 71 $ 82 $ 87