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Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Feb. 25, 2015
Stockholders' Equity Note [Abstract]
Stock repurchase program, number of shares authorized for repurchase				2,000,000
Treasury stock, shares acquired		180,100
Treasury stock, acquired		$ 2,600
Treasury stock acquired, average cost per share		$ 14.62
Stock repurchase program, remaining number of shares authorized to be repurchased		1,096,989
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Beginning Balance, net of taxes		$ (93,015)	$ (101,498)
Amortization of actuarial loss, before taxes	[1]	478	1,598
Effect of settlements, before taxes	[1]	297	501
Income taxes		(298)	(805)
Ending Balance, net of taxes		$ (92,538)	$ (100,204)
[1] Represents amounts reclassified from accumulated other comprehensive loss. These amounts are included in the computation of net periodic pension cost. For additional information, see Note 8, Retirement and Benefit Plans.

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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 before 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 before tax of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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