Financing Arrangements (Details) - USD ($) $ in Thousands	Jan. 30, 2015	Jun. 30, 2024	Dec. 31, 2023
Financing Arrangements
Long-term finance lease obligation		$ 43,004	$ 43,674
Security deposit		5,900
Building
Financing Arrangements
Proceeds from sale of corporate headquarters	$ 48,900
Lease term	22 years
Long-term finance lease obligation		44,500
UBS Bank USA
Financing Arrangements
Security deposit		$ 5,900