XML 82 R70.htm IDEA: XBRL DOCUMENT v3.10.0.1
INVESTMENT SECURITIES - OTTI Losses on Available-for-Sale Debt Securities (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Schedule of Available-for-sale Securities [Line Items]        
Total OTTI losses $ 0 $ 0 $ 0 $ (12,231)
Credit losses on debt securities for which an OTTI was no previously recognized   0   12,231
Portion of loss previously recognized in other comprehensive income 0 0 0 0
Net impairment losses recognized in earnings [1] $ 0 0 $ 0 (12,231)
Mortgage Backed Securities Issued By Private Enterprises [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Credit losses on debt securities for which an OTTI was no previously recognized   0   0
US States And Political Subdivisions Member [Member]        
Schedule of Available-for-sale Securities [Line Items]        
Credit losses on debt securities for which an OTTI was no previously recognized   $ 0   $ 12,231
[1]
Credit losses on Puerto Rico government debt securities, recorded in the first quarter of 2017.