Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Increase (Decrease) in Stockholders' Equity
Beginning balance	$ 999,472	$ 842,292	$ 1,085,963	$ 841,574
Other comprehensive income (loss)	265	(5,320)	(5,521)	(8,545)
Ending balance	950,873	832,890	950,873	832,890
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity
Beginning balance	(7,173)	2,548	(1,387)	5,773
Loss recognized in other comprehensive income (loss), net of tax benefit of $155, $0, $1,745 and $0, respectively	(583)	(4,529)	(6,566)	(6,828)
(Gain) loss reclassified from accumulated other comprehensive income (loss) to interest expense, net of tax benefit of $225, $0, $277 and $0, respectively	848	(791)	1,045	(1,717)
Other comprehensive income (loss)	265	(5,320)	(5,521)	(8,545)
Ending balance	(6,908)	(2,772)	(6,908)	(2,772)
Loss recognized in other comprehensive income, tax expense (benefit)	(155)	0	(1,745)	0
(Gain) loss reclassified from accumulated other comprehensive loss, tax expense (benefit)	$ (225)	0	$ (277)	0
Valuation adjustment		$ 1,100		$ 1,800