Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Assets:
Trading securities	$ 54,293	$ 22,955
Total assets	598,566	1,010,689
Liabilities:
Total liabilities	205,714	117,327
Net unrealized gains on equity securities	31,300
Carrying amount of investments without readily determinable fair value	7,500
Interest rate swaps
Liabilities:
Derivative liability	112,852	56,418
Foreign exchange derivative contracts
Assets:
Derivative Asset	101,918	72,076
Cash collateral for foreign exchange derivative contracts	22,612	6,086
Liabilities:
Derivative liability	92,862	60,909
Cash collateral obligation for foreign exchange derivative contracts	34,812	25,618
Repurchase agreements
Assets:
Cash and cash equivalents	385,351	833,658
Money market
Assets:
Cash and cash equivalents	52,981	54,978
Certificates of deposit
Assets:
Cash and cash equivalents	4,023	27,022
Level 1
Assets:
Trading securities	54,293	22,955
Total assets	54,293	22,955
Liabilities:
Total liabilities	0	0
Level 1 | Interest rate swaps
Liabilities:
Derivative liability	0	0
Level 1 | Foreign exchange derivative contracts
Assets:
Derivative Asset	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	0
Total assets	544,273	987,734
Liabilities:
Total liabilities	205,714	117,327
Level 2 | Interest rate swaps
Liabilities:
Derivative liability	112,852	56,418
Level 2 | Foreign exchange derivative contracts
Assets:
Derivative Asset	101,918	72,076
Cash collateral for foreign exchange derivative contracts	0	0
Liabilities:
Derivative liability	92,862	60,909
Cash collateral obligation for foreign exchange derivative contracts	0	0
Level 2 | Repurchase agreements
Assets:
Cash and cash equivalents	385,351	833,658
Level 2 | Money market
Assets:
Cash and cash equivalents	52,981	54,978
Level 2 | Certificates of deposit
Assets:
Cash and cash equivalents	4,023	27,022
Level 3
Assets:
Trading securities	0	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:
Derivative Asset	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