Stockholders' Equity (Accumulated Other Comprehensive (Loss) Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Accumulated Other Comprehensive (Loss) Income [Roll Forward]
Unrealized Gain on Securities	$ 2,542
Realized gain on sale of securities, net of tax	(390)
Other comprehensive income, net of reclassifications and tax	5,775
Unrealized Gain on Securities	7,927
Unrecognized Net Pension and Postretirement Costs	(3,843)
Realized loss due to settlement and curtailment, net of tax	175
Other comprehensive income, net of reclassifications and tax	3
Unrecognized Net Pension and Postretirement Costs	(3,665)
Accumulated Other Comprehensive (Loss) Income	(1,301)
Realized gain on sale of securities, net of tax	(390)
Realized loss due to settlement and curtailment, net of tax	175
Other comprehensive income, net of reclassifications and tax	5,778
Accumulated Other Comprehensive (Loss) Income	$ 4,262

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Other Comprehensive Income (Loss), Net of Reclassifications and Tax

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Other Comprehensive Income (Loss), Reclassification Adjustment in Net Income, Net of Tax

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Other Comprehensive Income (Loss), Settlement and Curtailment Costs of Pension and Other Postretirement Benefit Plan Valuation, Net of Tax

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Accumulated appreciation or loss, net of tax, in value of the total of available-for-sale securities at the end of an accounting period.

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The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount after tax of gain (loss) adjustment to other comprehensive income (loss) resulting from settlement or curtailment of defined benefit pension and other postretirement defined benefit plans.

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Amount after tax, before reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement benefit plans.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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