Stock-Based Compensation and Other Employee Benefit Plans (Stock Options) (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Stock options exercised, intrinsic value	$ 1.8	$ 0.8
Stock options exercised, proceeds, net of shares withheld	$ 2.1	$ 0.5
Common Stock [Member]
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Stock-based compensation, options outstanding (in shares)	0	202,700
Stock-based compensation, options exercised (in shares)	202,700	81,971
Common Stock [Member] | Stock Options [Member]
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]
Stock options exercised, per share weighted average exercise price	$ 13.06