Accrued Expenses (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Payroll and benefits	$ 90,561	$ 115,693
Short-term operating lease liabilities	42,082	40,972
Income taxes payable	18,587	11,661
Deferred revenue and customer advances	13,881	16,177
Accrued severance plan obligations	11,192	13,408
Short-term finance lease liabilities	9,168	9,121
Accrued interest	3,629	11,638
Other accrued expenses	47,364	48,556
Total accrued expenses	$ 236,464	$ 267,226