Basis of Presentation - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Apr. 01, 2019	Mar. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Operating lease right-of-use assets	$ 243,342	$ 268,840	$ 0
Total lease liabilities	$ 311,488	330,600
Deferred tax liability corresponding to operating lease right-of-use assets		69,000
Deferred tax asset corresponding to operating lease liabilities		$ 93,000
Operating lease, deferred rent and tenant allowances			$ 24,000