Leases - Other Supplemental Information Related to Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 4,193	$ 5,285	$ 8,930	$ 11,246
Operating cash flows from finance leases	51	394	105	80
Financing cash flows from finance leases	300	45	596	723
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	(1,700)	981	(2,009)	1,936
Finance leases	$ (27)	$ 1,592	$ (27)	$ 1,592
Weighted-average remaining lease term:
Operating leases	3 years 2 months 12 days		3 years 2 months 12 days		3 years 4 months 24 days
Finance leases	3 years 8 months 12 days		3 years 8 months 12 days		4 years 1 month 6 days
Weighted-average discount rate:
Operating leases	4.30%		4.30%		4.40%
Finance leases	4.30%		4.30%		4.30%