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Income Taxes - Significant components of the company's deferred tax assets (Details 1) - USD ($)
$ in Thousands
Mar. 31, 2017
Mar. 31, 2016
Income Tax Disclosure [Abstract]    
Allowance for credit losses not currently deductible for tax purposes $ 7,742 $ 5,918
Share-based compensation 487 491
Interest rate swap agreements (6) 78
Other items 282 128
Deferred income taxes $ 8,505 $ 6,615