Supplemental balance sheet information related to leases (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020
Operating lease right-of-use assets	$ 31,281	$ 31,230	$ 37,576
Current portion of operating lease liabilities	7,998	7,898	9,914
Long-term operating lease liabilities	20,826	19,725	24,040
Total operating lease liabilities	$ 28,824	$ 27,623	$ 33,954