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Income Taxes (Summary of Additional Income Tax Disclosures) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Taxes [Abstract]
Tax benefit (provision) on (loss) income from discontinued operations	$ 200	$ 450	$ 14,482
Excess tax benefit from equity compensation recorded to paid-in-capital	(141)	2,609	1,864
Deferred tax (provision) benefit for adjustments in other comprehensive income (loss) (See Note 3)	$ (8,061)	$ (313)	$ 4,919

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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