Note Other assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Other Assets
Net deferred tax assets (net of valuation allowance)	$ 1,185,302	$ 1,035,110
Investments under the equity method	215,576	215,349
Prepaid taxes	42,038	168,852
Other prepaid expenses	89,462	84,771
Derivative assets	15,763	16,719
Trades receivables from brokers and counterparties	38,552	7,514	$ 60,511
Receivables from investment maturities	50,000	70,000
Principal, interest and escrow servicing advances	87,577	107,299
Guaranteed mortgage loan claims receivable	104,712	163,819
Others	111,798	122,070
Total other assets	1,940,780	1,991,323
Other Assets
Other Assets
Derivative assets	$ 15,763	$ 16,539