Stock Options and Restricted Stock - Summary of Restricted Stock and Performance Share Units Activity (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014	Dec. 31, 2013
Restricted Stock
Restricted Stock
Beginning Balance (In Shares)	698
Granted (In Shares)	261		548	307
Vested (In Shares)	(61)
Forfeited (In Shares)	(77)
Ending Balance (In Shares)	821	[1]	698
Weighted Average Fair Value
Beginning Balance (in dollars per share)	$ 28.75
Granted (in dollars per share)	31.78		$ 29.11	$ 29.23
Vested (in dollars per share)	27.07
Forfeited (in dollars per share)	29.45
Ending Balance (in dollars per share)	$ 29.77		$ 28.75
Performance Share Units
Restricted Stock
Beginning Balance (In Shares)	111
Granted (In Shares)	358
Vested (In Shares)	0
Forfeited (In Shares)	(124)
Ending Balance (In Shares)	345	[1]	111
Weighted Average Fair Value
Beginning Balance (in dollars per share)	$ 32.01
Granted (in dollars per share)	32.03
Vested (in dollars per share)	0.00
Forfeited (in dollars per share)	29.86
Ending Balance (in dollars per share)	$ 32.8	[1]	$ 32.01

[1] The outstanding non-vested restricted stock as of December 31, 2015 includes 37,500 shares that are subject to performance conditions.