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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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-Publisher FASB
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Carrying amount as of the balance sheet date of all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings or defeasance; includes real and personal property; equity interests in corporations, partnerships, and joint ventures; and beneficial interests in trusts.

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