Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

v3.3.1.900
Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Income Tax Examination [Line Items]        
Income tax expense $ 1,954 $ 6,164 $ 7,462 $ 11,017
Pre-tax income (loss) 10,623 $ 21,767 27,638 49,902
Decrease of deferred tax liability     $ (455) $ 3,224
Annual effective tax rate before discrete events     29.90% 28.50%
Long-term liability for uncertain tax positions 647   $ 647  
Liability for uncertain tax positions 1,281      
Interest and penalties accrued as income tax expense     $ 23  
Industrial Process Insulators, Inc.        
Income Tax Examination [Line Items]        
Liability for uncertain tax positions $ 501