Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Assets:
Trading Securities		$ 22,955
Total assets	$ 457,756	1,010,689
Liabilities:
Total liabilities	179,863	117,327
Realized gain on trading securities sold	30,000
Carrying amount of investments without readily determinable fair value	7,500
Interest rate swaps
Liabilities:
Derivative liability	100,722	56,418
Foreign exchange derivative contracts
Assets:
Foreign exchange derivative contracts	97,799	72,076
Cash collateral for foreign exchange derivative contracts	18,984	6,086
Liabilities:
Derivative liability	79,141	60,909
Cash collateral obligation for foreign exchange derivative contracts	24,234	25,618
Repurchase agreements
Assets:
Cash and cash equivalents	312,939	833,658
Money market
Assets:
Cash and cash equivalents	46,846	54,978
Certificates of deposit
Assets:
Cash and cash equivalents	172	27,022
Level 1
Assets:
Trading Securities		22,955
Total assets	0	22,955
Liabilities:
Total liabilities	0	0
Level 1 | Interest rate swaps
Liabilities:
Derivative liability	0	0
Level 1 | Foreign exchange derivative contracts
Assets:
Foreign exchange derivative contracts	0	0
Cash collateral for foreign exchange derivative contracts	0	0
Liabilities:
Derivative liability	0	0
Cash collateral obligation for foreign exchange derivative contracts	0	0
Level 1 | Repurchase agreements
Assets:
Cash and cash equivalents	0	0
Level 1 | Money market
Assets:
Cash and cash equivalents	0	0
Level 1 | Certificates of deposit
Assets:
Cash and cash equivalents	0	0
Level 2
Assets:
Trading Securities		0
Total assets	457,756	987,734
Liabilities:
Total liabilities	179,863	117,327
Level 2 | Interest rate swaps
Liabilities:
Derivative liability	100,722	56,418
Level 2 | Foreign exchange derivative contracts
Assets:
Foreign exchange derivative contracts	97,799	72,076
Cash collateral for foreign exchange derivative contracts	0	0
Liabilities:
Derivative liability	79,141	60,909
Cash collateral obligation for foreign exchange derivative contracts	0	0
Level 2 | Repurchase agreements
Assets:
Cash and cash equivalents	312,939	833,658
Level 2 | Money market
Assets:
Cash and cash equivalents	46,846	54,978
Level 2 | Certificates of deposit
Assets:
Cash and cash equivalents	172	27,022
Level 3
Assets:
Trading Securities		0
Total assets	0	0
Liabilities:
Total liabilities	0	0
Level 3 | Interest rate swaps
Liabilities:
Derivative liability		0
Level 3 | Foreign exchange derivative contracts
Assets:
Foreign exchange derivative contracts	0	0
Cash collateral for foreign exchange derivative contracts	0	0
Liabilities:
Derivative liability	0	0
Cash collateral obligation for foreign exchange derivative contracts	0	0
Level 3 | Repurchase agreements
Assets:
Cash and cash equivalents	0	0
Level 3 | Money market
Assets:
Cash and cash equivalents	0	0
Level 3 | Certificates of deposit
Assets:
Cash and cash equivalents	$ 0	$ 0