Stockholders' Equity - Schedule of 2017 Nonvested Share Activity (Details) - 2017 Plan	9 Months Ended
	Sep. 30, 2019 $ / shares shares
Number of Shares
Non-vested, beginning balance (in shares) | shares	508,438
Vested (in shares) | shares	(170,858)
Non-vested, ending balance (in shares) | shares	337,580
Weighted Average Grant Date Fair Value Per Share
Non-vested, beginning balance (in dollars per share) | $ / shares	$ 24.29
Vested (in dollars per share) | $ / shares	27.90
Non-vested, ending balance (in dollars per share) | $ / shares	$ 20.56