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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Non-accrual Loans) (Details) - USD ($) $ in Thousands | Jun. 30, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | $ 22,680 | $ 22,298 |
Foreclosed properties, net | 1,548 | 1,677 | $ 1,693
Total non-performing assets | 24,228 | 23,975 |
Performing troubled debt restructurings | 788 | 1,735 |
Total impaired assets | $ 25,016 | $ 25,710 |
Total non-accrual loans and leases to gross loans and leases | 1.56% | 1.56% |
Total non-performing assets to total gross loans and leases plus foreclosed properties, net | 1.67% | 1.67% |
Total non-performing assets to total assets | 1.33% | 1.35% |
Allowance for loan and lease losses to gross loans and leases | 1.25% | 1.14% |
Allowance for loan and lease losses to non-accrual loans and leases | 80.04% | 73.17% |
Commercial real estate — owner occupied |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | $ 3,794 | $ 2,907 |
Commercial real estate — non-owner occupied |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | 1,970 | 1,678 |
Land development |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | 3,814 | 4,393 |
Construction |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | 306 | 397 |
Multi-family |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | 0 | 2 |
1-4 family |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | 2,185 | 2,550 |
Total non-accrual commercial real estate |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | $ 12,069 | $ 11,927 |
Allowance for loan and lease losses to gross loans and leases | 1.22% | 1.24% |
Commercial and industrial |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | $ 9,867 | $ 9,136 |
Direct financing leases, net |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | 0 | 38 |
Home equity and second mortgages |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | 209 | 542 |
Other |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | 535 | 655 |
Total non-accrual consumer and other loans |  |  |
Financing Receivable, Impaired |  |  |
Non-accrual loans and leases | $ 744 | $ 1,197 |
Allowance for loan and lease losses to gross loans and leases | 2.68% | 2.89% |

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