Financial Derivatives (Interest Rate Swaps) (Details) - Interest rate swaps $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Long
Derivative [Line Items]
Notional Amount	$ 113,973
Fair Value	1,403
Long | 2022 [Member]
Derivative [Line Items]
Notional Amount	53,974
Fair Value	354
Long | 2023 [Member]
Derivative [Line Items]
Notional Amount	48,657
Fair Value	677
Long | 2024 [Member]
Derivative [Line Items]
Notional Amount	11,342
Fair Value	$ 372
Long | Weighted Average
Derivative [Line Items]
Pay Rate	1.96%
Receive Rate	2.47%
Remaining Years to Maturity	3 years 124 days
Long | Weighted Average | 2022 [Member]
Derivative [Line Items]
Pay Rate	1.85%
Receive Rate	2.52%
Remaining Years to Maturity	2 years 245 days
Long | Weighted Average | 2023 [Member]
Derivative [Line Items]
Pay Rate	2.00%
Receive Rate	2.39%
Remaining Years to Maturity	3 years 277 days
Long | Weighted Average | 2024 [Member]
Derivative [Line Items]
Pay Rate	2.33%
Receive Rate	2.60%
Remaining Years to Maturity	4 years 266 days
Short
Derivative [Line Items]
Notional Amount	$ 383,222
Fair Value	(7,627)
Short | 2020 [Member]
Derivative [Line Items]
Notional Amount	68,607
Fair Value	(69)
Short | 2021 [Member]
Derivative [Line Items]
Notional Amount	124,050
Fair Value	(576)
Short | 2023 [Member]
Derivative [Line Items]
Notional Amount	101,012
Fair Value	(1,124)
Short | 2024 [Member]
Derivative [Line Items]
Notional Amount	2,900
Fair Value	(274)
Short | 2026 [Member]
Derivative [Line Items]
Notional Amount	1,512
Fair Value	(53)
Short | 2028 [Member]
Derivative [Line Items]
Notional Amount	32,942
Fair Value	(1,493)
Short | 2029 [Member]
Derivative [Line Items]
Notional Amount	44,494
Fair Value	(2,904)
Short | 2030 [Member]
Derivative [Line Items]
Notional Amount	685
Fair Value	(26)
Short | 2049 [Member]
Derivative [Line Items]
Notional Amount	7,020
Fair Value	$ (1,108)
Short | Weighted Average
Derivative [Line Items]
Pay Rate	2.11%
Receive Rate	2.32%
Remaining Years to Maturity	4 years 91 days
Short | Weighted Average | 2020 [Member]
Derivative [Line Items]
Pay Rate	1.74%
Receive Rate	2.38%
Remaining Years to Maturity	274 days
Short | Weighted Average | 2021 [Member]
Derivative [Line Items]
Pay Rate	2.03%
Receive Rate	2.03%
Remaining Years to Maturity	1 year 339 days
Short | Weighted Average | 2023 [Member]
Derivative [Line Items]
Pay Rate	2.06%
Receive Rate	2.48%
Remaining Years to Maturity	3 years 288 days
Short | Weighted Average | 2024 [Member]
Derivative [Line Items]
Pay Rate	2.60%
Receive Rate	2.60%
Remaining Years to Maturity	4 years 186 days
Short | Weighted Average | 2026 [Member]
Derivative [Line Items]
Pay Rate	2.28%
Receive Rate	2.31%
Remaining Years to Maturity	6 years 274 days
Short | Weighted Average | 2028 [Member]
Derivative [Line Items]
Pay Rate	2.40%
Receive Rate	2.41%
Remaining Years to Maturity	8 years 307 days
Short | Weighted Average | 2029 [Member]
Derivative [Line Items]
Pay Rate	2.64%
Receive Rate	2.55%
Remaining Years to Maturity	9 years 219 days
Short | Weighted Average | 2030 [Member]
Derivative [Line Items]
Pay Rate	2.38%
Receive Rate	2.52%
Remaining Years to Maturity	11 years 146 days
Short | Weighted Average | 2049 [Member]
Derivative [Line Items]
Pay Rate	2.89%
Receive Rate	2.60%
Remaining Years to Maturity	29 years 193 days