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Fair Value Measurements (Details 3) $ in Thousands	3 Months Ended
	Jun. 30, 2016 USD ($) item	Jun. 30, 2015 USD ($) item
Changes in the fair value of Level 3 assets measured on a recurring basis
Total gains or losses (unrealized): included in earnings	$ 0	$ 0
Number of transfers between levels | item	0	0
U.S. States and political subdivisions securities
Changes in the fair value of Level 3 assets measured on a recurring basis
Balance at the beginning of the period	$ 4,810	$ 5,632
Total gains or losses (realized/unrealized): included in earnings	0	0
Total gains or losses (realized/unrealized): included in other comprehensive income	(4)	(38)
Purchases	0	0
Issuances	0	0
Sales	0	0
Settlements	0	0
Maturities	(145)	(150)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at the end of the period	4,661	5,444
Foreign government and other securities
Changes in the fair value of Level 3 assets measured on a recurring basis
Balance at the beginning of the period	809	808
Total gains or losses (realized/unrealized): included in earnings	0	0
Total gains or losses (realized/unrealized): included in other comprehensive income	1	(1)
Purchases	0	0
Issuances	0	0
Sales	0	0
Settlements	0	0
Maturities	0	0
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at the end of the period	810	807
Investment securities available-for-sale
Changes in the fair value of Level 3 assets measured on a recurring basis
Balance at the beginning of the period	5,619	6,440
Total gains or losses (realized/unrealized): included in earnings	0	0
Total gains or losses (realized/unrealized): included in other comprehensive income	(3)	(39)
Purchases	0	0
Issuances	0	0
Sales	0	0
Settlements	0	0
Maturities	(145)	(150)
Transfers into Level 3	0	0
Transfers out of Level 3	0	0
Balance at the end of the period	$ 5,471	$ 6,251

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Amount of unrealized (holding) gain (loss) which is included in the statement of income (or changes in net assets) related to those assets still held at the reporting date for which fair value is measured on a recurring basis using significant unobservable inputs (Level 3).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)
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