Derivative Instruments (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Derivative [Line Items]
Notional amount	$ 2,233,000		$ 2,233,000		$ 2,280,000
Fair value of yield maintenance provisions	96,000		96,000		122,000
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	2,233,000		2,233,000		2,280,000
Net gains (losses) recognized in earnings	0	$ 0	0	$ 0
Interest Rate Lock Commitments [Member]
Derivative [Line Items]
Notional amount	4,039,000		4,039,000		2,164,000
Fair value of yield maintenance provisions	17,000		17,000		$ 9,000
CF Bank [Member]
Derivative [Line Items]
Securities pledged as collateral	$ 673,000		$ 673,000