Mortgage Servicing Rights (Details) - USD ($)	3 Months Ended	4 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2015	Sep. 01, 2015
Mortgage Servicing Rights, Carrying Values [Abstract]
Gross carrying amount						$ 6,802,000
Accumulated amortization						(390,000)
Net carrying amount	$ 6,412,000	$ 6,412,000		$ 6,412,000	$ 6,412,000	6,412,000
Changes in mortgage servicing right [Roll Forward]
Beginning balance acquired in Magna Merger	6,412,000			6,412,000
Ending balance		6,412,000			6,412,000
Net Servicing Fee Revenues [Abstract]
Mortgage servicing rights associated with Fannie Mae portfolio	830,000,000
Proceeds from Sale of Mortgage Servicing Rights (MSR)	6,600,000		$ 0	6,747,626	0
Income Recorded from Sale of Mortgage Servicing Portfolio	241,000			241,000
Residential [Member]
Mortgage Servicing Rights, Carrying Values [Abstract]
Net carrying amount	6,412,000	6,412,000		6,412,000	6,412,000	$ 6,412,000	$ 6,641,000
Changes in mortgage servicing right [Roll Forward]
Beginning balance acquired in Magna Merger	$ 6,412,000			$ 6,412,000
Add: Originated MSRs		161,000
Servicing Asset at Amortized Cost, Amortization		(390,000)			(386,000)
Ending balance		6,412,000			6,412,000
Net Servicing Fee Revenues [Abstract]
Gross servicing fees					1,090,000
Late charges and other ancillary revenue					160,000
Gross servicing revenue					1,250,000
Servicing Asset at Amortized Cost, Amortization		$ (390,000)			(386,000)
Guaranty fees and loan pay-off interest					9,000
Other servicing expenses					51,000
Gross servicing expenses					446,000
Net servicing fee income					$ 804,000