Annual report pursuant to Section 13 and 15(d)

Organization and Significant Accounting Policies - OCI (Details)

v3.19.1
Organization and Significant Accounting Policies - OCI (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance $ 463,875 $ 155,569 $ 112,481
Other comprehensive income (loss) before reclassifications (28,959) 41,867  
Amounts reclassified out of AOCI (1,033) 2,853  
Other comprehensive income (loss) (27,926) 39,014  
Balance 639,415 463,875 155,569
Foreign currency translation gains (losses) (2)      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance 9,715 (25,556)  
Other comprehensive income (loss) before reclassifications (19,835) 35,271  
Amounts reclassified out of AOCI (4,230) 0  
Other comprehensive income (loss) (24,065) 35,271  
Balance (14,350) 9,715 (25,556)
Defined benefit post-retirement plan adjustments      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance 879 1,134  
Other comprehensive income (loss) before reclassifications 81 (64)  
Amounts reclassified out of AOCI (167) (191)  
Other comprehensive income (loss) (86) (255)  
Balance 793 879 1,134
Defined benefit pension plans      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance (14,831) (14,998)  
Other comprehensive income (loss) before reclassifications (1,525) 409  
Amounts reclassified out of AOCI 598 (242)  
Other comprehensive income (loss) (927) 167  
Balance (15,758) (14,831) (14,998)
Other Comprehensive Income (Loss), Tax 2,400 2,300 2,700
Defined Benefit Pension Plans, tax benefit 200 (400)  
Equity interest in investee's other comprehensive loss      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance 285 (5,299)  
Other comprehensive income (loss) before reclassifications (11) 5,584  
Amounts reclassified out of AOCI 0 0  
Other comprehensive income (loss) (11) 5,584  
Balance 274 285 (5,299)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance 1,154 2,907  
Other comprehensive income (loss) before reclassifications (1,286) 667  
Amounts reclassified out of AOCI 698 (2,420)  
Other comprehensive income (loss) (588) (1,753)  
Balance 566 1,154 2,907
Accumulated Gain (Loss) from Components Excluded from Assessment of Fair Value Hedge Effectiveness, net [Member]      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance 0 0  
Other comprehensive income (loss) before reclassifications (6,383) 0  
Amounts reclassified out of AOCI (4,134) 0  
Other comprehensive income (loss) (2,249) 0  
Balance (2,249) 0 0
Accumulated Other Comprehensive Income (Loss)      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance (2,798) (41,812) (31,425)
Balance (30,724) (2,798) (41,812)
Currency Swap [Member] | Other Operating Income (Expense) [Member] | Net Investment Hedging [Member]      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax $ 5,009 $ 0 $ 0