Business Combination (Amount Recognized for Assets Acquired and Liabilities Assumed) (Details) - USD ($)	Dec. 31, 2016	Jan. 22, 2016	Dec. 31, 2015
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value:
Deposits	$ (162,200,000)
Goodwill	2,312,000		$ 0
Bank of America
Business Acquisition [Line Items]
Purchase price		$ 6,015,000
Recognized amounts of identifiable assets acquired and (liabilities assumed), at fair value:
Cash and cash equivalents		186,371,000
Acquired loans		417,000
Premises and equipment, net		964,000
Accrued interest receivable		2,000
Core deposit intangible		2,239,000
Other assets		103,000
Deposits	$ (162,200,000)	(186,364,000)
Accrued interest payable		(7,000)
Other liabilities		(22,000)
Total fair value of identifiable net assets		3,703,000
Goodwill		$ 2,312,000