Fair Value of Financial Instruments (Narrative) (Details) $ in Thousands |
9 Months Ended | |
|---|---|---|
|
Sep. 30, 2016
USD ($)
security
|
Dec. 31, 2015
USD ($)
|
|
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||
| Amortized Cost | $ 151,329 | $ 173,549 |
| Available-for-sale Securities | $ 148,037 | 170,232 |
| Collateralized debt obligations [Member] | ||
| Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||
| Acquired Trust Preferred Securities, Number of Securities | security | 12 | |
| Amortized Cost | $ 24,721 | 25,766 |
| Available-for-sale Securities | $ 19,927 | $ 22,211 |