Investment Securities (Narrative) (Details) (USD $)	3 Months Ended			9 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Transferred From Available-For-Sale to Held-To-Maturity [Member]	Dec. 31, 2013 Transferred From Available-For-Sale to Held-To-Maturity [Member]	Dec. 31, 2013 CLOs [Member]	Mar. 31, 2014 CLOs [Member]
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items]
Carrying value of securities pledged	$ 265,550,000		$ 315,530,000
Securities classified as trading	0		0
Impairment charge						166,000
Securities sold							17,520,000
Securities held to maturity, fair value	147,480,000		137,087,000
Securities transferred from available-for-sale to held-to-maturity category, amortized cost	12,626,000			12,630,000
Securities transferred from available-for-sale to held-to-maturity category, fair value				12,640,000
Securities transferred from available-for-sale to held-to-maturity category, unrealized holding loss	(8,000)	0			8,310,000
Securities transferred from available-for-sale to held-to-maturity, remaining unamortized balance				4,880,000
Securities transferred from available-for-sale to held-to-maturity, remaining unamortized balance, net of tax				3,180,000
Investment in FHLBB stock	$ 7,496,000		$ 7,496,000