Derivative Financial Instruments (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2009
Derivative Financial Instruments
After-tax unrealized gain on cash flow hedge in other comprehensive income	$ 49,000	$ 28,000
Cash flow hedge liability	797,000	900,000
Ineffectiveness in the cash flow hedge		0	$ 0	$ 0
Collateral provided	850,000	950,000,000,000
Mortgage loan pipeline
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	115,945,000	135,542,000			$ 87,486,000
Expected closures
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	86,959,000	101,657,000			65,615,000
Mortgage loan pipeline commitments
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	2,187,000	2,613,000			1,415,000
Forward commitments
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	106,000,000	154,000,000			73,000,000
Net fair value of the open contracts	(461,000)	(530,000)			$ (21,000)
Non-designated hedges | Mortgage servicing rights hedging
Derivative Financial Instruments
Notional amount	121,000,000	93,000,000
Net fair value of the open contracts recorded as an asset	$ (150,000)	$ 368,000
Interest rate contracts | Cash flow hedge
Derivative Financial Instruments
Fixed rate payable on notional amount (as a percent)	4.06%
Variable rate basis, variable rate receivable on notional amount	three-month LIBOR
Notional amount						$ 8,000,000