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Derivatives (Narratives) (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Mar. 31, 2019
Interest Rate Derivatives [Abstract]      
Total notional amount of Company's variable interest rate swaps on debt $ 249,625   $ 22,792
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax   $ 422  
Loss reclassified from AOCI into income (effective portion) 3 $ 516  
Reclassify net losses on interest rate contracts from AOCI to earnings over the next twelve months $ 1,700