Derivatives - Fair Value of Derivative Contracts (Detail) - USD ($) $ in Thousands		Mar. 31, 2019	Dec. 13, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts, Assets		$ 2,953	$ 1,979
Derivative contracts, Liabilities		2,536	91,129
Notional Amounts	[1]	14,148,301	18,374,656
Foreign Exchange Swaps [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts, Assets		2,594	1,611
Derivative contracts, Liabilities		2,092	2,072
Notional Amounts	[1]	1,001,289	482,295
Foreign Exchange/Commodities Options [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts, Assets			39
Derivative contracts, Liabilities		42	88,016
Notional Amounts	[1]	4,557	4,745,428
Forwards [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts, Assets		28	236
Derivative contracts, Liabilities		171	639
Notional Amounts	[1]	93,470	79,008
Futures [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative contracts, Assets		331	93
Derivative contracts, Liabilities		231	402
Notional Amounts	[1]	$ 13,048,985	$ 13,067,925

[1] Notional amounts represent the sum of gross long and short derivative contracts, an indication of the volume of the Company’s derivative activity and does not represent anticipated losses.