Income Taxes - Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current tax provision—
Federal	$ 22,728	$ 35,434	$ 32,721
State and Puerto Rico	8,589	6,054	4,683
Total current	31,317	41,488	37,404
Deferred tax provision (benefit)—
Federal	4,347	5,391	(2,101)
State and Puerto Rico	109	(1,213)	862
Total deferred	4,456	4,178	(1,239)
Provision for income taxes	$ 35,773	$ 45,666	$ 36,165