Loan Portfolio and Credit Quality TDR Loans Restructured or Defaulted in Period (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended			3 Months Ended	6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended			9 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended		3 Months Ended		9 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended			9 Months Ended				6 Months Ended	3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended	3 Months Ended		9 Months Ended			3 Months Ended		6 Months Ended		3 Months Ended		9 Months Ended
	Sep. 30, 2014 Loans	Sep. 30, 2013 Loans	Sep. 30, 2014 Loans	Sep. 30, 2013 Loans	Sep. 30, 2014 Commercial and industrial [Member] Loans	Sep. 30, 2013 Commercial and industrial [Member] Loans	Sep. 30, 2014 Commercial and industrial [Member] Loans	Sep. 30, 2013 Commercial and industrial [Member] Loans		Jun. 30, 2013 Commercial and industrial [Member] Temporary Rate Reduction [Member] Loans	Jun. 30, 2014 Commercial and industrial [Member] Temporary Rate Reduction [Member] Loans	Jun. 30, 2013 Commercial and industrial [Member] Temporary Rate Reduction [Member] Loans	Jun. 30, 2014 Commercial and industrial [Member] Combination of Concessions [Member] Loans	Jun. 30, 2013 Commercial and industrial [Member] Combination of Concessions [Member] Loans	Jun. 30, 2014 Commercial and industrial [Member] Combination of Concessions [Member] Loans	Jun. 30, 2013 Commercial and industrial [Member] Combination of Concessions [Member] Loans	Jun. 30, 2013 Commercial and industrial [Member] Extension of Term [Member] Loans	Jun. 30, 2014 Commercial and industrial [Member] Extension of Term [Member] Loans	Jun. 30, 2013 Commercial and industrial [Member] Extension of Term [Member] Loans	Sep. 30, 2014 Commercial real estate [Member] Loans	Sep. 30, 2013 Commercial real estate [Member] Loans		Sep. 30, 2014 Commercial real estate [Member] Loans	Sep. 30, 2013 Commercial real estate [Member] Loans		Jun. 30, 2014 Commercial real estate [Member] Combination of Concessions [Member] Loans	Jun. 30, 2013 Commercial real estate [Member] Combination of Concessions [Member] Loans	Jun. 30, 2014 Commercial real estate [Member] Combination of Concessions [Member] Loans	Jun. 30, 2013 Commercial real estate [Member] Combination of Concessions [Member] Loans	Jun. 30, 2013 Commercial real estate [Member] Extension of Term [Member] Loans	Jun. 30, 2014 Commercial real estate [Member] Extension of Term [Member] Loans	Jun. 30, 2013 Commercial real estate [Member] Extension of Term [Member] Loans	Sep. 30, 2014 Construction and land [Member] Loans	Sep. 30, 2013 Construction and land [Member] Loans	Sep. 30, 2014 Construction and land [Member] Loans	Sep. 30, 2013 Construction and land [Member] Loans		Jun. 30, 2014 Construction and land [Member] Extension of Term [Member] Loans	Jun. 30, 2013 Construction and land [Member] Extension of Term [Member] Loans	Jun. 30, 2014 Construction and land [Member] Extension of Term [Member] Loans	Jun. 30, 2013 Construction and land [Member] Extension of Term [Member] Loans	Sep. 30, 2014 Residential [Member] Loans	Sep. 30, 2013 Residential [Member] Loans		Sep. 30, 2014 Residential [Member] Loans		Sep. 30, 2013 Residential [Member] Loans		Jun. 30, 2013 Residential [Member] Payment Deferral [Member] Loans	Jun. 30, 2014 Residential [Member] Temporary Rate Reduction [Member] Loans	Jun. 30, 2013 Residential [Member] Temporary Rate Reduction [Member] Loans	Jun. 30, 2014 Residential [Member] Temporary Rate Reduction [Member] Loans	Jun. 30, 2013 Residential [Member] Temporary Rate Reduction [Member] Loans	Jun. 30, 2013 Residential [Member] Combination of Concessions [Member] Loans	Jun. 30, 2013 Residential [Member] Extension of Term [Member] Loans	Jun. 30, 2014 Residential [Member] Extension of Term [Member] Loans	Sep. 30, 2014 Home equity [Member] Loans	Sep. 30, 2013 Home equity [Member] Loans	Sep. 30, 2014 Home equity [Member] Loans	Sep. 30, 2013 Home equity [Member] Loans		Jun. 30, 2014 Home equity [Member] Extension of Term [Member] Loans	Jun. 30, 2013 Home equity [Member] Extension of Term [Member] Loans	Jun. 30, 2014 Home equity [Member] Extension of Term [Member] Loans	Jun. 30, 2013 Home equity [Member] Extension of Term [Member] Loans	Sep. 30, 2014 Consumer and other [Member] Loans	Sep. 30, 2013 Consumer and other [Member] Loans	Sep. 30, 2014 Consumer and other [Member] Loans	Sep. 30, 2013 Consumer and other [Member] Loans
Financing Receivable, Modifications [Line Items]
Financing Receivable, Modifications, Number of Contracts	0	4	3	25	0	0	0	3	[1]			1				1			1	0	2	[2]	0	7	[3]		2		3			4	0	0	0	4	[4]				4	0	2	[5]	3	[5]	10	[5]			2	3	10				0	0	0	1	[4]				1	0	0	0	0
Financing Receivable, Modifications, Pre-Modification Recorded Investment	$ 0	$ 2,425	$ 287	$ 17,308	$ 0	$ 0	$ 0	$ 1,369	[1]											$ 0	$ 2,198	[2]	$ 0	$ 11,361	[3]								$ 0	$ 0	$ 0	$ 3,604	[4]					$ 0	$ 227	[5]	$ 287	[5]	$ 934	[5]									$ 0	$ 0	$ 0	$ 40	[4]					$ 0	$ 0	$ 0	$ 0
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	2,425	296	17,308	0	0	0	1,369	[1]			200				200			1,000	0	2,198	[2]	0	11,361	[3]		2,198		2,400			9,000	0	0	0	3,604	[4]				3,604	0	227	[5]	296	[5]	934	[5]			227	296	934				0	0	0	40	[4]				40	0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Number of Contracts	2	3	4	7	0	1	0	1												0	2		0	5									0	0	0	0						2	0		4		1										0	0	0	0						0	0	0	0
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$ 518	$ 2,500	$ 663	$ 7,171	$ 0	$ 983	$ 0	$ 983												$ 0	$ 1,517		$ 0	$ 5,072									$ 0	$ 0	$ 0	$ 0						$ 518	$ 0		$ 663		$ 1,116										$ 0	$ 0	$ 0	$ 0						$ 0	$ 0	$ 0	$ 0

[1] Represents the following concessions: extension of term (1 loan; post-modification recorded investment of $1.0 million), temporary reduction of interest rate (1 loan; post-modification recorded investment of $0.2 million), and combination of concessions (1 loan; post-modification recorded investment of $0.2 million).

[2] Represents the following concessions: combination of concessions.

[3] Represents the following concessions: extension of term (4 loans; post-modification recorded investment of $9.0 million) and combination of concessions (3 loans; post-modification recorded investment of $2.4 million).

[4] Represents the following concessions: extension of term.

[5] Represents the following concessions: temporary reduction of interest rate.