Derivative Instruments Schedule of Interest Rate Swaps by Maturity (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Derivative [Line Items] |
|
|
| Derivative, Fair Value, Net |
$ (2,542)
|
$ (5,628)
|
| Short [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
553,843
|
424,820
|
| Derivative, Fair Value, Net |
$ (3,470)
|
$ (4,508)
|
| Weighted Average Pay Rate |
1.63%
|
1.87%
|
| Weighted Average Receive Rate |
0.36%
|
0.23%
|
| Derivative, Average Remaining Maturity |
5 years 245 days
|
8 years 204 days
|
| Short [Member] | Year 2016 [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 48,000
|
$ 48,000
|
| Derivative, Fair Value, Net |
$ (83)
|
$ (91)
|
| Weighted Average Pay Rate |
0.80%
|
0.80%
|
| Weighted Average Receive Rate |
0.39%
|
0.23%
|
| Derivative, Average Remaining Maturity |
281 days
|
1 year 281 days
|
| Short [Member] | Year 2017 [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 74,750
|
$ 74,750
|
| Derivative, Fair Value, Net |
$ (445)
|
$ (388)
|
| Weighted Average Pay Rate |
1.21%
|
1.21%
|
| Weighted Average Receive Rate |
0.41%
|
0.24%
|
| Derivative, Average Remaining Maturity |
1 year 215 days
|
2 years 215 days
|
| Short [Member] | Year 2018 [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 71,529
|
$ 10,000
|
| Derivative, Fair Value, Net |
$ 80
|
$ 167
|
| Weighted Average Pay Rate |
1.11%
|
0.84%
|
| Weighted Average Receive Rate |
0.34%
|
0.23%
|
| Derivative, Average Remaining Maturity |
2 years 102 days
|
3 years 120 days
|
| Short [Member] | Year 2020 [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 119,893
|
$ 23,500
|
| Derivative, Fair Value, Net |
$ 220
|
$ 471
|
| Weighted Average Pay Rate |
1.51%
|
1.42%
|
| Weighted Average Receive Rate |
0.33%
|
0.23%
|
| Derivative, Average Remaining Maturity |
4 years 131 days
|
5 years 139 days
|
| Short [Member] | Year 2022 [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 19,444
|
|
| Derivative, Fair Value, Net |
$ 86
|
|
| Weighted Average Pay Rate |
1.76%
|
|
| Weighted Average Receive Rate |
0.34%
|
|
| Derivative, Average Remaining Maturity |
6 years 186 days
|
|
| Short [Member] | Year 2023 [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 131,400
|
$ 209,350
|
| Derivative, Fair Value, Net |
$ (1,367)
|
$ 140
|
| Weighted Average Pay Rate |
2.10%
|
2.13%
|
| Weighted Average Receive Rate |
0.38%
|
0.23%
|
| Derivative, Average Remaining Maturity |
7 years 142 days
|
8 years 146 days
|
| Short [Member] | Year 2024 [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 9,200
|
$ 12,900
|
| Derivative, Fair Value, Net |
$ 11
|
$ (605)
|
| Weighted Average Pay Rate |
1.99%
|
2.73%
|
| Weighted Average Receive Rate |
0.32%
|
0.23%
|
| Derivative, Average Remaining Maturity |
8 years 95 days
|
9 years 164 days
|
| Short [Member] | Year 2025 [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 58,560
|
|
| Derivative, Fair Value, Net |
$ (5)
|
|
| Weighted Average Pay Rate |
2.06%
|
|
| Weighted Average Receive Rate |
0.33%
|
|
| Derivative, Average Remaining Maturity |
9 years 117 days
|
|
| Short [Member] | Year 2043 [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 21,067
|
$ 46,320
|
| Derivative, Fair Value, Net |
$ (1,967)
|
$ (4,202)
|
| Weighted Average Pay Rate |
3.03%
|
3.12%
|
| Weighted Average Receive Rate |
0.36%
|
0.23%
|
| Derivative, Average Remaining Maturity |
27 years 142 days
|
28 years 153 days
|
| Long [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 9,700
|
|
| Derivative, Fair Value, Net |
$ 857
|
|
| Weighted Average Pay Rate |
0.32%
|
|
| Weighted Average Receive Rate |
3.00%
|
|
| Derivative, Average Remaining Maturity |
9 years 201 days
|
|
| Long [Member] | Year 2025 [Member] | Interest Rate Swap [Member] |
|
|
| Derivative [Line Items] |
|
|
| Derivative notional |
$ 9,700
|
|
| Derivative, Fair Value, Net |
$ 857
|
|
| Weighted Average Pay Rate |
0.32%
|
|
| Weighted Average Receive Rate |
3.00%
|
|
| Derivative, Average Remaining Maturity |
9 years 201 days
|
|