Schedule of Remaining Contractual Maturities of Repurchase Agreements by Type of Collateral Pledged (Detail) - USD ($)
$ in Thousands |
Sep. 30, 2016 |
Dec. 31, 2015 |
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
$ 118,532
|
$ 138,614
|
| Overnight and Continuous |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
66,063
|
|
| Up to 30 Days |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
202
|
|
| 30-90 Days |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
177
|
|
| Greater Than 90 Days |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
52,090
|
|
| Municipal securities |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
43,305
|
|
| Municipal securities | Overnight and Continuous |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
41,858
|
|
| Municipal securities | Greater Than 90 Days |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
1,447
|
|
| U.S. Agency securities |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
19,542
|
|
| U.S. Agency securities | Overnight and Continuous |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
19,542
|
|
| Mortgage-backed Agency securities |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
55,685
|
|
| Mortgage-backed Agency securities | Overnight and Continuous |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
4,663
|
|
| Mortgage-backed Agency securities | Up to 30 Days |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
202
|
|
| Mortgage-backed Agency securities | 30-90 Days |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
177
|
|
| Mortgage-backed Agency securities | Greater Than 90 Days |
|
|
| Assets Sold under Agreements to Repurchase [Line Items] |
|
|
| Securities sold under agreements to repurchase |
$ 50,643
|
|