Stock-Based Compensation - Summary of RSU Award Activity (Details) - Restricted Stock Units (RSUs) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2017 USD ($) $ / shares shares
Restricted Stock
Exchanged | shares	180,374
Forfeited | shares	(1,602)
Vested | shares	(167,963)
Outstanding at the end of the Period (in shares) | shares	10,809
Weighted Average Grant Date Fair Value
Exchanged | $ / shares	$ 19.23
Forfeited | $ / shares	19.13
Vested | $ / shares	19.24
Outstanding as of September 30, 2017 | $ / shares	$ 19.13
Weighted- Average Remaining Contractual Life
Weighted- Average Remaining Contractual Life (in years)	8 months 12 days
Aggregate Intrinsic Value
Aggregate fair value | $	$ 0.1