Supplemental Statement of Cash Flows (Details) - USD ($)		12 Months Ended
	Jul. 01, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest		$ 3,520,000	$ 2,927,000	$ 2,470,000
Cash paid for income taxes		4,100,000	2,750,000	2,475,000
Supplemental Disclosures of Non Cash Flow Information:
Sale and finance of stock to ESOP			500,000
Issuance of stock to ESOP		110,000
Net issuance of common stock for vesting of restricted stock units to cover withholding		159,000	500,000
Net foreclosure of other real estate owned		493,000	$ 1,115,000	$ 1,154,000
Noncash liabilities assumed
Shares of common stock exchanged in connection with acquisition (in shares)	1,185,067
IBT
Noncash assets acquired
Securities available for sale		4,646,000
Loans		88,459,000
Bank premises, furniture and equipment		4,947,000
Securities available for sale		790,000
Bank-owned life insurance		1,024,000
Accrued interest receivable		250,000
Servicing assets		323,000
Goodwill		7,717,000
Core deposit intangibles		1,078,000
Total assets		109,234,000
Noncash liabilities assumed
Deposits		97,426,000
FHLB advances		3,503,000
Other borrowings		926,000
Other liabilities		824,000
Total liabilities		102,679,000
1,185,067 shares of common stock exchanged in connection with acquisition		$ 17,705,000
Shares of common stock exchanged in connection with acquisition (in shares)		1,185,067
IBT | Building
Noncash assets acquired
Bank premises, furniture and equipment		$ 3,310
IBT | Land
Noncash assets acquired
Bank premises, furniture and equipment		$ 1,490