Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Components of inventory
Raw materials and parts	$ 134,636	$ 132,041
Work-in-progress	59,681	55,688
Finished goods	127,024	109,882
Total Inventory, Net	$ 321,341	$ 297,611

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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