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Fair Value Measurements - Reconciliation for measurements at fair value on a recurring basis using significant unobservable inputs (Details) - Recurring - Level 3 - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative Asset      
Assets:      
Balance at beginning of period $ 10,779 $ 7,238 $ 11,841
Transfers into Level 3 74 583  
Additions 261 368  
Sales and settlements   0 (1,135)
Fair value adjustments included in OCI 0 0 0
Fair value adjustments included in earnings (4,356) 2,590 (3,468)
Balance at end of period 6,758 10,779 7,238
Corporate Bonds      
Assets:      
Balance at beginning of period 1,750 998 995
Transfers into Level 3 0 0  
Additions 500 1,750  
Sales and settlements   (1,000) 0
Fair value adjustments included in OCI 145 2 3
Fair value adjustments included in earnings 0 0 0
Balance at end of period 2,395 1,750 998
Derivative Liability      
Liabilities:      
Balance at beginning of period 2,408 8,559 15,732
Transfers into Level 3 0 0  
Additions 170 0  
Sales and settlements   0 (2,330)
Fair value adjustments included in OCI 0 0 0
Fair value adjustments included in earnings 2,470 (6,151) (4,843)
Balance at end of period $ 5,048 $ 2,408 $ 8,559