Leases - Total Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Amortization of Right-of-Use Assets	$ 1,542
Interest on Lease Liabilities	363
Total Finance Lease Cost	1,905
Operating Lease Cost	112,387
Sublease Receipts	(3,044)
Total Lease Cost	114,292
Future sublease rental income in one year	2,700
Future sublease rental income in two years	2,400
Future sublease rental income in three years	1,500
Future sublease rental income in four years	1,000
Future sublease rental income in five years	500
Future sublease rental income in five years and thereafter	300
Operating Lease Cost Classified within Operating Expenses
Lessee, Lease, Description [Line Items]
Operating Lease Cost	112,092
Operating Lease cost classified within Restructuring Expenses, Net
Lessee, Lease, Description [Line Items]
Operating Lease Cost	$ 3,339