Stock-Based Compensation - Summary of Stock Option Activity (Details)	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Number of Shares
Number of Shares, Beginning Balance (in shares) | shares	76,751
Number of Shares, Exercised (in shares) | shares	(55,106)
Number of Shares, Ending Balance (in shares) | shares	21,645
Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning Balance (in $ per share) | $ / shares	$ 12.86
Weighted Average Exercise Price, Exercised (in $ per share) | $ / shares	9.52
Weighted Average Exercise Price, Ending Balance (in $ per share) | $ / shares	$ 21.37