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Leases Leases: Other Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Jan. 01, 2019
Dec. 31, 2018
Lessee Disclosure [Abstract]      
Operating cash flows from operating leases $ 13,508    
Operating cash flows from finance leases 1,862    
Financing cash flows from finance leases 783    
Right-of-use assets obtained in exchange for lease obligations, operating leases 4,211    
Right-of-use assets obtained in exchange for lease obligations, finance leases $ 2,637    
Weighted-average remaining lease term, operating leases 8 years    
Weighted-average remaining lease term, finance leases 14 years    
Weighted-average discount rate, operating leases [1] 6.50%    
Weighted-average discount rate, finance leases 8.50%    
Lessee, Operating Lease, Liability, Payment, Due [Abstract]      
2020 $ 13,344    
2021 12,211    
2022 10,847    
2023 10,521    
2024 9,920    
Thereafter 32,592    
Total future minimum lease payments 89,435    
Less: interest (22,027)    
Total lease obligations 67,408 $ 72,400  
Less: current obligations (9,379)    
Long-term lease obligations 58,029 63,498 $ 0
Finance Lease, Liability, Payment, Due [Abstract]      
2020 3,009    
2021 3,048    
2022 3,043    
2023 3,071    
2024 3,076    
Thereafter 28,889    
Total future minimum lease payments 44,136    
Less: interest (19,634)    
Total lease obligations 24,502    
Less: current obligations (1,083)    
Long-term lease obligations 23,419 $ 21,921 $ 0
Minimum lease payment amount for operating leases signed but not yet commenced $ 3,900    
[1] Upon adoption of the new lease standard, discount rates used for existing leases were established at January 1, 2019.