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Summary Of Balance Sheet Information Related To Operating Leases (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Operating Leases
ROU assets	$ 183,326
Current portion of long-term obligations	57,373
Operating lease liabilities	124,485
Total operating lease liabilities	$ 181,858
Weighted Average Remaining Lease Term
Operating leases	3 years 8 months 12 days
Weighted Average Discount Rate
Operating leases	4.56%

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