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Deposits (Tables) | 6 Months Ended
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Jun. 30, 2020
Deposits [Abstract] |
Deposit Account Balances | Deposits account balances are summarized as follows (in thousands):
| June 30, 2020 |  | December 31, 2019
Non-interest-bearing checking | $ | 517,441 |  |  | $ | 387,409 |
Negotiable orders of withdrawal (NOW) and interest-bearing checking | 685,988 |  |  | 573,927 |
Savings and money market | 1,483,734 |  |  | 1,398,345 |
Certificates of deposit | 934,495 |  |  | 1,048,552 |
Total deposits | $ | 3,621,658 |  |  | $ | 3,408,233 |
Interest Expense on Deposits | Interest expense on deposit accounts is summarized for the periods indicated (in thousands):
| Three Months Ended June 30, |  |  |  | Six Months Ended June 30, |  |
| 2020 |  | 2019 |  | 2020 |  | 2019
NOW and interest-bearing checking, savings, and money market | $ | 2,894 |  |  | $ | 5,377 |  |  | $ | 6,967 |  |  | $ | 10,171 |
Certificates of deposit | 4,579 |  |  | 5,172 |  |  | 9,785 |  |  | 10,625 |
Total interest expense on deposit accounts | $ | 7,473 |  |  | $ | 10,549 |  |  | $ | 16,752 |  |  | $ | 20,796 |

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