Annual report pursuant to Section 13 and 15(d)

Acquisition, Goodwill and Other Intangible Assets - Intangible Assets related to Acquisition (Details)

v3.7.0.1
Acquisition, Goodwill and Other Intangible Assets - Intangible Assets related to Acquisition (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, net $ 86,178 $ 103,998
Industrial Process Insulators, Inc. [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 8,589 13,347
Accumulated Amortization 2,069 1,046
Intangible assets, net $ 6,520 12,301
Industrial Process Insulators, Inc. [Member] | Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 8 years  
Gross carrying amount $ 5,962 10,720
Accumulated Amortization 1,242 715
Intangible assets, net $ 4,720 10,005
Industrial Process Insulators, Inc. [Member] | Trademark    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 8 years  
Gross carrying amount $ 1,820 1,820
Accumulated Amortization 379 152
Intangible assets, net $ 1,441 1,668
Industrial Process Insulators, Inc. [Member] | Other Intangible Assets    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 3 years  
Gross carrying amount $ 807 807
Accumulated Amortization 448 179
Intangible assets, net 359 628
Sumac    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 2,740 2,806
Accumulated Amortization 1,464 750
Intangible assets, net $ 1,276 2,056
Sumac | Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 4 years  
Gross carrying amount $ 2,551 2,612
Accumulated Amortization 1,275 653
Intangible assets, net $ 1,276 1,959
Sumac | Other Intangible Assets    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 2 years  
Gross carrying amount $ 189 194
Accumulated Amortization 189 97
Intangible assets, net 0 97
Unitemp    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 515 459
Accumulated Amortization 209 116
Intangible assets, net $ 306 343
Unitemp | Developed Technology Rights    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 3 years  
Gross carrying amount $ 96 86
Accumulated Amortization 67 31
Intangible assets, net 29 55
CHS Transactions    
Finite-Lived Intangible Assets [Line Items]    
Intangible assets, net 86,178 103,998
CHS Transactions | Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization 64,682 54,913
CHS Transactions | Other Intangible Assets    
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization 2,268 1,848
CHS Transactions | Developed Technology Rights    
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 3,454 2,988
Trademark | Unitemp    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 8 years  
Gross carrying amount $ 419 373
Accumulated Amortization 142 85
Intangible assets, net 277 288
Trademark | CHS Transactions    
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 521 $ 237