Income Taxes - Significant components of the company's deferred tax assets (Details 1) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Allowance for credit losses not currently deductible for tax purposes	$ 5,811	$ 7,742
Share-based compensation	266	487
Interest rate swap agreements	0	(6)
Other items	212	282
Deferred income taxes	$ 6,289	$ 8,505

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from derivative instruments.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=96869850&loc=d3e28680-109314

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from the provision for loan losses.

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