Earnings Per Share - Components of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income	$ 14,550	$ 8,571
Net loss attributable to redeemable noncontrolling interest	280	236
Net income attributable to common stockholders	$ 14,830	$ 8,807
Weighted average common shares outstanding - basic (in shares)	49,561,887	48,725,565
Dilutive effect of stock options and restricted stock units (in shares)	2,177,574	1,521,422
Weighted average common shares outstanding - diluted (in shares)	51,739,461	50,246,987
Weighted average common shares outstanding — diluted (C)
Basic (in dollars per share)	$ 0.30	$ 0.18
Diluted (in dollars per share)	$ 0.29	$ 0.18