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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
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Recorded Investment    
With no impairment reserve recorded $ 22,503 $ 11,345
With impairment reserve recorded 15,718 14,566
Total 38,221 25,911
Unpaid Principal Balance    
With no impairment reserve recorded 25,881 14,722
With impairment reserve recorded 15,723 14,572
Total 41,604 29,294
Impairment Reserve    
Impairment Reserve 6,158 5,599
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 12,425 13,371
With impairment reserve recorded [1] 15,454 9,615
Total [1] 27,879 22,986
Foregone Interest Income    
With no impairment reserve recorded 391 838
With impairment reserve recorded 321 779
Foregone interest income 712 1,617
Interest Income Recognized    
With no impairment reserve recorded 0 614
With impairment reserve recorded 0 0
Total 0 614
Net Foregone Interest Income    
With no impairment reserve recorded 391 224
With impairment reserve recorded 321 779
Total 712 1,003
Commercial real estate — owner occupied    
Recorded Investment    
With no impairment reserve recorded 5,066 1,788
With impairment reserve recorded 428 499
Total 5,494 2,287
Unpaid Principal Balance    
With no impairment reserve recorded 5,066 1,788
With impairment reserve recorded 428 499
Total 5,494 2,287
Impairment Reserve    
Impairment Reserve 42 70
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 2,921 3,577
With impairment reserve recorded [1] 432 111
Total [1] 3,353 3,688
Foregone Interest Income    
With no impairment reserve recorded 205 328
With impairment reserve recorded 6 28
Foregone interest income 211 356
Interest Income Recognized    
With no impairment reserve recorded 0 118
With impairment reserve recorded 0 0
Total 0 118
Net Foregone Interest Income    
With no impairment reserve recorded 205 210
With impairment reserve recorded 6 28
Total 211 238
Commercial real estate — non-owner occupied    
Recorded Investment    
With no impairment reserve recorded 1,979 1,609
With impairment reserve recorded 0 0
Total 1,979 1,609
Unpaid Principal Balance    
With no impairment reserve recorded 2,019 1,647
With impairment reserve recorded 0 0
Total 2,019 1,647
Impairment Reserve    
Impairment Reserve 0 0
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 1,996 1,318
With impairment reserve recorded [1] 0 0
Total [1] 1,996 1,318
Foregone Interest Income    
With no impairment reserve recorded 36 91
With impairment reserve recorded 0 0
Foregone interest income 36 91
Interest Income Recognized    
With no impairment reserve recorded 0 79
With impairment reserve recorded 0 0
Total 0 79
Net Foregone Interest Income    
With no impairment reserve recorded 36 12
With impairment reserve recorded 0 0
Total 36 12
Land development    
Recorded Investment    
With no impairment reserve recorded 3,355 3,440
With impairment reserve recorded 0 0
Total 3,355 3,440
Unpaid Principal Balance    
With no impairment reserve recorded 6,025 6,111
With impairment reserve recorded 0 0
Total 6,025 6,111
Impairment Reserve    
Impairment Reserve 0 0
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 3,422 3,898
With impairment reserve recorded [1] 0 0
Total [1] 3,422 3,898
Foregone Interest Income    
With no impairment reserve recorded 24 107
With impairment reserve recorded 0 0
Foregone interest income 24 107
Interest Income Recognized    
With no impairment reserve recorded 0 0
With impairment reserve recorded 0 0
Total 0 0
Net Foregone Interest Income    
With no impairment reserve recorded 24 107
With impairment reserve recorded 0 0
Total 24 107
Construction    
Recorded Investment    
With no impairment reserve recorded 2,120 436
With impairment reserve recorded 2,482 2,482
Total 4,602 2,918
Unpaid Principal Balance    
With no impairment reserve recorded 2,120 438
With impairment reserve recorded 2,482 2,482
Total 4,602 2,920
Impairment Reserve    
Impairment Reserve 1,777 1,790
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 917 291
With impairment reserve recorded [1] 2,482 834
Total [1] 3,399 1,125
Foregone Interest Income    
With no impairment reserve recorded 12 20
With impairment reserve recorded 63 45
Foregone interest income 75 65
Interest Income Recognized    
With no impairment reserve recorded 0 0
With impairment reserve recorded 0 0
Total 0 0
Net Foregone Interest Income    
With no impairment reserve recorded 12 20
With impairment reserve recorded 63 45
Total 75 65
Multi-family    
Recorded Investment    
With no impairment reserve recorded 0 0
With impairment reserve recorded 0 0
Total 0 0
Unpaid Principal Balance    
With no impairment reserve recorded 0 0
With impairment reserve recorded 0 0
Total 0 0
Impairment Reserve    
Impairment Reserve 0 0
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 3 0
With impairment reserve recorded [1] 0 0
Total [1] 3 0
Foregone Interest Income    
With no impairment reserve recorded 0 1
With impairment reserve recorded 0 0
Foregone interest income 0 1
Interest Income Recognized    
With no impairment reserve recorded 0 134
With impairment reserve recorded 0 0
Total 0 134
Net Foregone Interest Income    
With no impairment reserve recorded 0 (133)
With impairment reserve recorded 0 0
Total 0 (133)
1-4 family    
Recorded Investment    
With no impairment reserve recorded 2,463 2,379
With impairment reserve recorded 72 193
Total 2,535 2,572
Unpaid Principal Balance    
With no impairment reserve recorded 2,463 2,379
With impairment reserve recorded 77 199
Total 2,540 2,578
Impairment Reserve    
Impairment Reserve 2 39
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 2,473 2,755
With impairment reserve recorded [1] 72 203
Total [1] 2,545 2,958
Foregone Interest Income    
With no impairment reserve recorded 16 125
With impairment reserve recorded 1 5
Foregone interest income 17 130
Interest Income Recognized    
With no impairment reserve recorded 0 94
With impairment reserve recorded 0 0
Total 0 94
Net Foregone Interest Income    
With no impairment reserve recorded 16 31
With impairment reserve recorded 1 5
Total 17 36
Commercial and industrial    
Recorded Investment    
With no impairment reserve recorded 7,146 1,307
With impairment reserve recorded 12,409 11,166
Total 19,555 12,473
Unpaid Principal Balance    
With no impairment reserve recorded 7,146 1,307
With impairment reserve recorded 12,409 11,166
Total 19,555 12,473
Impairment Reserve    
Impairment Reserve 4,010 3,700
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 318 709
With impairment reserve recorded [1] 12,355 8,448
Total [1] 12,673 9,157
Foregone Interest Income    
With no impairment reserve recorded 83 79
With impairment reserve recorded 251 701
Foregone interest income 334 780
Interest Income Recognized    
With no impairment reserve recorded 0 62
With impairment reserve recorded 0 0
Total 0 62
Net Foregone Interest Income    
With no impairment reserve recorded 83 17
With impairment reserve recorded 251 701
Total 334 718
Direct financing leases, net    
Recorded Investment    
With no impairment reserve recorded 0 0
With impairment reserve recorded 0 0
Total 0 0
Unpaid Principal Balance    
With no impairment reserve recorded 0 0
With impairment reserve recorded 0 0
Total 0 0
Impairment Reserve    
Impairment Reserve 0 0
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 0 6
With impairment reserve recorded [1] 0 0
Total [1] 0 6
Foregone Interest Income    
With no impairment reserve recorded 0 0
With impairment reserve recorded 0 0
Foregone interest income 0 0
Interest Income Recognized    
With no impairment reserve recorded 0 0
With impairment reserve recorded 0 0
Total 0 0
Net Foregone Interest Income    
With no impairment reserve recorded 0 0
With impairment reserve recorded 0 0
Total 0 0
Home equity and second mortgages    
Recorded Investment    
With no impairment reserve recorded 7 8
With impairment reserve recorded 0 0
Total 7 8
Unpaid Principal Balance    
With no impairment reserve recorded 7 8
With impairment reserve recorded 0 0
Total 7 8
Impairment Reserve    
Impairment Reserve 0 0
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 7 307
With impairment reserve recorded [1] 0 0
Total [1] 7 307
Foregone Interest Income    
With no impairment reserve recorded 0 16
With impairment reserve recorded 0 0
Foregone interest income 0 16
Interest Income Recognized    
With no impairment reserve recorded 0 127
With impairment reserve recorded 0 0
Total 0 127
Net Foregone Interest Income    
With no impairment reserve recorded 0 (111)
With impairment reserve recorded 0 0
Total 0 (111)
Other    
Recorded Investment    
With no impairment reserve recorded 367 378
With impairment reserve recorded 327 226
Total 694 604
Unpaid Principal Balance    
With no impairment reserve recorded 1,035 1,044
With impairment reserve recorded 327 226
Total 1,362 1,270
Impairment Reserve    
Impairment Reserve 327 0
Average Recorded Investment(1)    
With no impairment reserve recorded [1] 368 510
With impairment reserve recorded [1] 113 19
Total [1] 481 529
Foregone Interest Income    
With no impairment reserve recorded 15 71
With impairment reserve recorded 0 0
Foregone interest income 15 71
Interest Income Recognized    
With no impairment reserve recorded 0 0
With impairment reserve recorded 0 0
Total 0 0
Net Foregone Interest Income    
With no impairment reserve recorded 15 71
With impairment reserve recorded 0 0
Total $ 15 $ 71
[1] (1)Average recorded investment is calculated primarily using daily average balances.