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Significant Acquisitions and Other Transactions (Finite-Lived Intangible Assets Fiscal Year Maturity) (Details) (USD $)
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Dec. 31, 2014
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|---|---|
| Goodwill and Intangible Assets Disclosure [Abstract] | |
| Intangible assets accumulated amortization | $ 2,700,000 |
| Gross carrying amount of intangible assets | 13,900,000 |
| Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] | |
| 2015 | 3,160,000 |
| 2016 | 3,160,000 |
| 2017 | 3,160,000 |
| 2018 | 898,000 |
| 2019 | 144,000 |
| Thereafter | 725,000 |
| Total | $ 11,247,000 |