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Defined Benefit Pension Plans Expected Benefits (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended |
|---|---|
|
Dec. 31, 2014
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| Defined Benefit Plan Disclosure [Line Items] | |
| Year ending December 31, 2015 | $ 1,117 |
| 2016 | 1,268 |
| 2017 | 1,454 |
| 2018 | 1,529 |
| 2019 | 1,618 |
| Years 2020 to 2024 | 9,233 |
| Pension Plans, Defined Benefit [Member] | |
| Defined Benefit Plan Disclosure [Line Items] | |
| Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year | $ 1,038 |