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Loans and Allowance for Credit Losses - Troubled Debt Restructurings (Details) number in Thousands, $ in Thousands	3 Months Ended					9 Months Ended
	Mar. 31, 2016 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2016 USD ($) Loans	Mar. 31, 2015 USD ($) Loans	Sep. 30, 2014	Sep. 30, 2014	Dec. 31, 2015 USD ($)
Financing Receivable, Modifications [Line Items]
Loans and Leases Receivable, Impaired, Commitment to Lend	$ 0	$ 0	$ 0
Outstanding Recorded Investment	5,565	5,565	5,565				$ 5,623
Reserves specific to modified loans	3	$ 3	$ 3				$ 1
Defaults on troubled debt restructurings		0	0		0	0
Commercial and industrial
Financing Receivable, Modifications [Line Items]
Number of Loans | Loans			2	2
Pre-Modification Outstanding Recorded Investment	45			$ 42
Principal Modification	0			0
Post Modification Outstanding Recorded Investment	45			42
Outstanding Recorded Investment	$ 45	$ 45	$ 45	$ 42

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Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL6953676-111524

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The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

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Reflects the unfunded portion of contractual agreements to lend funds to borrowers for loans whose terms have been modified by troubled debt restructuring.

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-Name Accounting Standards Codification
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