Stock Incentive Plans - Summary of Restricted Stock Activity (Details) - Restricted Stock $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) $ / shares shares
Number of Restricted Stock
Outstanding, as of beginning of period (in shares) | shares	1,708
Granted (in shares) | shares	24
Forfeited/Canceled (in shares) | shares	(17)
Vested (in shares) | shares	(214)
Outstanding, as of end of period (in shares) | shares	1,501
Weighted Average Grant Date Fair Value
Outstanding, as of beginning of period (in dollars per share) | $ / shares	$ 21.86
Granted (in dollars per share) | $ / shares	25.25
Forfeited/Canceled (in dollars per share) | $ / shares	19.48
Vested (in dollars per share) | $ / shares	21.88
Outstanding, as of end of period (in dollars per share) | $ / shares	$ 21.91
Vested, total intrinsic value of restricted stock vested | $	$ 5,054