Stock Incentive Plans - Summary of Restricted Stock Activity (Details) - Restricted Stock $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) $ / shares shares
Number of Restricted Stock
Outstanding, as of beginning of period (in shares) | shares	1,293
Granted (in shares) | shares	538
Forfeited/Canceled (in shares) | shares	(84)
Vested (in shares) | shares	(157)
Outstanding, as of end of period (in shares) | shares	1,590
Weighted Average Grant Date Fair Value
Outstanding, as of beginning of period (in dollars per share) | $ / shares	$ 20.89
Granted (in dollars per share) | $ / shares	22.72
Forfeited/Canceled (in dollars per share) | $ / shares	21.70
Vested (in dollars per share) | $ / shares	21.08
Outstanding, as of end of period (in dollars per share) | $ / shares	$ 21.44
Vested, total intrinsic value of restricted stock vested | $	$ 3,972