Income Taxes - Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current [Abstract]
Federal	$ 20,068	$ 4,532	$ 16,959
State	7,145	5,997	5,687
Deferred [Abstract]
Federal	(3,104)	9,392	7,280
State	(776)	2,348	1,820
Income tax provision excluding deferred tax asset revaluation and reversal of valuation allowance	23,333	22,269	31,746
Deferred tax expense (benefit) - re-measurement of deferred tax assets		0	25,619
Deferred tax expense (benefit) - reversal of valuation allowance		0	(8,650)
Income tax provision	$ 23,333	$ 22,269	$ 48,715