Securities - Schedule of Available-for-Sales Securities (Details) - USD ($)
$ in Thousands |
Jun. 30, 2020 |
Dec. 31, 2019 |
| Debt Securities, Available-for-sale [Line Items] |
|
|
| Amortized Cost |
$ 1,301,271
|
$ 1,293,239
|
| Gross Unrealized Gains |
35,510
|
10,466
|
| Gross Unrealized Losses |
1,628
|
5,118
|
| Fair Value |
1,335,153
|
1,298,587
|
| U.S. Treasuries |
|
|
| Debt Securities, Available-for-sale [Line Items] |
|
|
| Amortized Cost |
400
|
1,840
|
| Gross Unrealized Gains |
0
|
0
|
| Gross Unrealized Losses |
0
|
0
|
| Fair Value |
400
|
1,840
|
| Obligations of U.S. Government sponsored entities |
|
|
| Debt Securities, Available-for-sale [Line Items] |
|
|
| Amortized Cost |
268,024
|
367,551
|
| Gross Unrealized Gains |
11,495
|
5,021
|
| Gross Unrealized Losses |
20
|
84
|
| Fair Value |
279,499
|
372,488
|
| Obligations of U.S. states and political subdivisions |
|
|
| Debt Securities, Available-for-sale [Line Items] |
|
|
| Amortized Cost |
119,703
|
96,668
|
| Gross Unrealized Gains |
2,743
|
1,178
|
| Gross Unrealized Losses |
60
|
61
|
| Fair Value |
122,386
|
97,785
|
| U.S. Government agencies |
|
|
| Debt Securities, Available-for-sale [Line Items] |
|
|
| Amortized Cost |
206,017
|
164,643
|
| Gross Unrealized Gains |
3,271
|
1,327
|
| Gross Unrealized Losses |
941
|
1,519
|
| Fair Value |
208,347
|
164,451
|
| U.S. Government sponsored entities |
|
|
| Debt Securities, Available-for-sale [Line Items] |
|
|
| Amortized Cost |
704,627
|
660,037
|
| Gross Unrealized Gains |
18,001
|
2,940
|
| Gross Unrealized Losses |
471
|
3,387
|
| Fair Value |
722,157
|
659,590
|
| U.S. corporate debt securities |
|
|
| Debt Securities, Available-for-sale [Line Items] |
|
|
| Amortized Cost |
2,500
|
2,500
|
| Gross Unrealized Gains |
0
|
0
|
| Gross Unrealized Losses |
136
|
67
|
| Fair Value |
$ 2,364
|
$ 2,433
|