Securities - Additional Information (Details) $ in Thousands	3 Months Ended
Jun. 30, 2017 USD ($) security
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Securities in unrealized loss positions greater than or equal to one year	1
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Securities impairment loss \| $	$ 508
Number of securities in unrealized loss position	10
Debt securities
Schedule of Available-for-sale Securities [Line Items]
Securities in unrealized loss positions greater than or equal to one year	14
Number of securities in unrealized loss position	69
U.S. agency collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	25
State and political subdivisions
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	12
U.S. agency mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	9
U.S. government sponsored entities and agencies
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	8
U.S. Treasury and federal agency
Schedule of Available-for-sale Securities [Line Items]
Number of securities in unrealized loss position	5

Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27290-111563

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- Definition

Number of investment positions in available-for-sale investments that have been in a continuous unrealized loss position for greater than or equal to a year for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

+ References

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- Definition

The amount by which the fair value of an investment in debt and equity securities categorized as Available-for-sale is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563

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