Goodwill and Other Intangible Assets (Mortgage Servicing Rights Activity) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Intangible Assets
Balance, beginning of year	$ 14,599,000
Balance, beginning of year	11,082,000	$ 14,599,000
Valuation allowance for servicing rights	0
Servicing rights
Other Intangible Assets
Balance, beginning of year	2,387,000	2,238,000	$ 2,295,000
Amortization	762,000	662,000	597,000
Servicing rights originated	680,000	566,000	497,000
Servicing rights acquired	0	245,000	43,000
Balance, beginning of year	$ 2,305,000	$ 2,387,000	$ 2,238,000