Annual report pursuant to Section 13 and 15(d)

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

v3.4.0.3
Goodwill and Other Intangible Assets - Intangible Assets related to Acquisition (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Finite-Lived Intangible Assets [Line Items]    
Net Carrying Amount $ 103,998 $ 100,813
Sumac    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 3,009  
Accumulated Amortization 953  
Net Carrying Amount $ 2,056  
Sumac | Order backlog    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 6 months  
Gross Carrying Amount $ 203  
Accumulated Amortization 203  
Net Carrying Amount $ 0  
Sumac | Other Intangible Assets    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 2 years  
Gross Carrying Amount $ 194  
Accumulated Amortization 97  
Net Carrying Amount $ 97  
Sumac | Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 4 years  
Gross Carrying Amount $ 2,612  
Accumulated Amortization 653  
Net Carrying Amount 1,959  
Industrial Process Insulators, Inc.    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 13,784  
Accumulated Amortization 1,483  
Net Carrying Amount $ 12,301  
Industrial Process Insulators, Inc. | Order backlog    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 6 months  
Gross Carrying Amount $ 437  
Accumulated Amortization 437  
Net Carrying Amount $ 0  
Industrial Process Insulators, Inc. | Other Intangible Assets    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 3 years  
Gross Carrying Amount $ 807  
Accumulated Amortization 179  
Net Carrying Amount $ 628  
Industrial Process Insulators, Inc. | Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 10 years  
Gross Carrying Amount $ 10,720  
Accumulated Amortization 715  
Net Carrying Amount $ 10,005  
Industrial Process Insulators, Inc. | Trademark    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 8 years  
Gross Carrying Amount $ 1,820  
Accumulated Amortization 152  
Net Carrying Amount 1,668  
Unitemp    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 459 1,255
Accumulated Amortization 116 17
Net Carrying Amount $ 343 1,238
Unitemp | Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 5 years  
Gross Carrying Amount $ 0 368
Accumulated Amortization 0 6
Net Carrying Amount $ 0 362
Unitemp | Developed Technology Rights    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 3 years  
Gross Carrying Amount $ 86 107
Accumulated Amortization 31 3
Net Carrying Amount 55 104
CHS Transactions    
Finite-Lived Intangible Assets [Line Items]    
Net Carrying Amount 89,298 99,575
CHS Transactions | Other Intangible Assets    
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization 1,572 1,317
CHS Transactions | Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization 53,545 44,195
CHS Transactions | Developed Technology Rights    
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization $ 2,957 2,469
Trademark | Unitemp    
Finite-Lived Intangible Assets [Line Items]    
Amortization period 8 years  
Gross Carrying Amount $ 373 780
Accumulated Amortization 85 8
Net Carrying Amount $ 288 $ 772