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Weighted Average Interest Rates for Each Type of Deposit (Detail) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Amount |  |
Interest-bearing checking and money market accounts | $ 12,936,301 | $ 13,395,080
Savings accounts | 5,210,001 | 5,280,374
Certificates of deposit | 8,643,646 | 7,577,170
Non-interest-bearing accounts | 2,312,215 | 2,635,279
Total deposits | $ 29,102,163 | $ 28,887,903
Percent of Total |  |
Interest-bearing checking and money market accounts | 44.45% | 46.37%
Savings accounts | 17.90% | 18.28%
Certificates of deposit | 29.70% | 26.23%
Non-interest-bearing accounts | 7.95% | 9.12%
Total deposits | 100.00% | 100.00%
Weighted Average Interest Rate |  |
Interest-bearing checking and money market accounts, weighted average interest rate | 0.23% | 0.55%
Savings accounts, weighted average interest rate | 0.52% | 0.46%
Certificates of deposit, weighted average interest rate | 1.31% | 1.12%
Non-interest-bearing accounts, weighted average interest rate | 0.00% | 0.00%
Total deposits, weighted average interest rate | 0.58% | 0.63%

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