Stock-Based Compensation Plans Options Activity (Details) (Stock Options, USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options
Stock Options
Outstanding as of December 31, 2013	5,567,701
Granted	288,626	617,869	470,528
Exercised	(215,047)
Forfeited	(435,502)
Expired	(903,314)
Outstanding as of December 31, 2014	4,302,464	5,567,701
Exercisable as of December 31, 2014	3,546,500
Weighted Average Exercise Price
Outstanding as of December 31, 2013 (usd per share)	$ 13.25
Granted (usd per share)	$ 12.61
Exercised (usd per share)	$ 9.62
Forfeited (usd per share)	$ 14.73
Expired (usd per share)	$ 14.95
Outstanding as of December 31, 2014 (usd per share)	$ 12.89	$ 13.25
Exercisable as of December 31, 2014 (usd per share)	$ 13.13
Additional Disclosures [Abstract]
Outstanding, Weighted Average Remaining Contractual Term	4 years 4 months 24 days
Exercisable, Weighted Average Remaining Contractual Term	3 years 6 months
Outstanding, Aggregate Intrinsic Value	$ 4,500,000
Exercisable, Aggregate Intrinsic Value	4,000,000
Number of options exercised	215,047	451,102	141,305
Total intrinsic value of options exercised	568,000	1,612,000	402,000
Cash received from options exercised	2,068,000	3,650,000	987,000
Tax deduction realized from options exercised	$ 568,000	$ 1,416,000	$ 322,000

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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