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Note Supplemental disclosure on the consolidated statments of cash flows (Additional disclosures on cash flow information cash and due from banks, and restricted cash) (Detail) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Supplemental Cash Flow Information        
Cash and due from banks $ 353,936 $ 381,289 $ 351,532  
Restricted cash and due from banks 40,099 21,568 10,862  
Restricted cash in money market investments 9,216 9,772 11,803  
Total cash and due from banks, and restricted cash shown in the statement of cash flow $ 403,251 [1] $ 412,629 [1] $ 374,196 $ 378,890
[1]
Refer to Note 5 - Restrictions on cash and due from banks and certain securities for nature of restrictions.