Quarterly report pursuant to Section 13 or 15(d)

Equity Transactions - Narrative (Details)

v3.19.3
Equity Transactions - Narrative (Details) - USD ($)
Sep. 30, 2019
Jun. 25, 2018
Jan. 18, 2018
Dec. 21, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock repurchase program, authorized amount         $ 50,000,000.0
Stock repurchase program, remaining authorized amount $ 44,800,000        
Twenty Thirteen Equity Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized (in shares) 11,000,000        
Number of shares available for grant (in shares)     7,070,298    
Equity Incentive Plan, 2017          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares authorized (in shares)   2,000,000   6,500,000  
Employee Stock Option | Twenty Thirteen Equity Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of shares available for grant (in shares)       2,097,846