Income Taxes (Changes in Valuation Allowance) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 11,184	$ 66,486	$ 46,048
Charge (benefit) to provision for income taxes	2,589	(49,877)	3,507
Charge (benefit) to other comprehensive income	0	(5,425)	16,931
Ending balance	$ 13,773	$ 11,184	$ 66,486

Valuation Allowance, Deferred Tax Asset, Change in Amount, Other Comprehensive Income

No definition available.

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- Definition

Valuation Allowance, Deferred Tax Asset, Change in Amount, Provision for Income Taxes

+ References

No definition available.

+ Details

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- Definition

Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319

+ Details

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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