XML 101 R50.htm IDEA: XBRL DOCUMENT v3.20.1
Summary of Significant Accounting Policies (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 01, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Significant accounting policies        
Allowance for uncollectible premiums receivable   $ 5,100 $ 4,800  
Statutory U.S tax rate 21.00%     35.00%
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect       $ (1,583)
Carried discounted reserves on workers’ compensation claims, net of reinsurance   116,900 96,300  
Workers’ compensation reserves, discount amount   $ 47,400 $ 37,000  
Outstanding common stock, par value   $ 0.01 $ 0.01  
Vested RSUs conversion common stock   906,182 548,292 517,446
Stock dividends declared   $ 0 $ 0 $ 0
ASU 2018-02        
Significant accounting policies        
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect $ 1,600      
Minimum        
Significant accounting policies        
Workers’ compensation reserves, discount rate (as a percent)   2.85% 2.85%  
Maximum        
Significant accounting policies        
Workers’ compensation reserves, discount rate (as a percent)   5.00% 5.00%  
Property, equipment, and leasehold improvements        
Significant accounting policies        
Unamortized balance   $ 3,300 $ 3,800  
Depreciation expense   $ 1,200 1,500 $ 1,700
Property, equipment, and leasehold improvements | Minimum        
Significant accounting policies        
Estimated useful lives   3 years    
Property, equipment, and leasehold improvements | Maximum        
Significant accounting policies        
Estimated useful lives   7 years    
Capitalized software        
Significant accounting policies        
Unamortized balance   $ 33,800 35,000  
Depreciation expense   $ 7,000 $ 5,800 $ 5,400
Capitalized software | Minimum        
Significant accounting policies        
Estimated useful lives   3 years    
Capitalized software | Maximum        
Significant accounting policies        
Estimated useful lives   7 years