Derivative Financial Instruments (Narrative) (Details)
$ in Millions |
12 Months Ended |
|
|
Dec. 31, 2019
USD ($)
contract
|
Dec. 31, 2018
USD ($)
|
| Derivative [Line Items] |
|
|
| Gain on derivative |
$ 1.2
|
|
| Deferred tax asset on gain on derivative |
$ 0.3
|
|
| Cash flow hedge ineffectiveness |
Interest rate swap agreements are entered into with counterparties that meet established credit standards and the Corporation believes that the credit risk inherent in these contracts is not significant at December 31, 2019.
|
|
| Interest Rate Swap Agreements [Member] |
|
|
| Derivative [Line Items] |
|
|
| Interest rate swap notional amount |
$ 30.0
|
|
| Number of interest rate swap contracts | contract |
4
|
|
| Interest rate swap fair value (asset) |
$ (0.1)
|
$ 1.0
|
| Swap Contract 3 Year 5 Million [Member] |
|
|
| Derivative [Line Items] |
|
|
| Interest rate swap notional amount |
$ 5.0
|
|
| Derivative, maturity date |
Jun. 17, 2019
|
|
| Derivative, term of contract |
3 years
|
|
| Swap Contract 5 Year $5 Million [Member] |
|
|
| Derivative [Line Items] |
|
|
| Interest rate swap notional amount |
$ 5.0
|
|
| Derivative, maturity date |
Mar. 17, 2021
|
|
| Derivative, term of contract |
5 years
|
|
| Swap Contract- 7 year $5 Million [Member] |
|
|
| Derivative [Line Items] |
|
|
| Interest rate swap notional amount |
$ 5.0
|
|
| Derivative, maturity date |
Mar. 17, 2023
|
|
| Derivative, term of contract |
7 years
|
|
| Swap Contract 10 Year $15 Million [Member] |
|
|
| Derivative [Line Items] |
|
|
| Interest rate swap notional amount |
$ 15.0
|
|
| Derivative, maturity date |
Mar. 17, 2026
|
|
| Derivative, term of contract |
10 years
|
|