Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Schedule of Performance Stock Units (Details)

v3.19.1
Stock-Based Compensation Schedule of Performance Stock Units (Details) - Performance shares - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Nonvested restricted shares or performance stock units, beginning of year 140,000 0
Nonvested restricted stock or performance stock units granted during year 169,000 166,000
Performance stock units, vested in period (116,000) 0
Performance stock units forfeited during year (45,000) (26,000)
Nonvested restricted shares or performance stock units, end of year 148,000 140,000
2018 Performance Stock Units    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Nonvested restricted shares or performance stock units, beginning of year 0 0
Nonvested restricted stock or performance stock units granted during year 169,000 0
Performance stock units, vested in period 0 0
Performance stock units forfeited during year (21,000) 0
Nonvested restricted shares or performance stock units, end of year 148,000 0
2017 Performance Stock Units    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Nonvested restricted shares or performance stock units, beginning of year 140,000 0
Nonvested restricted stock or performance stock units granted during year 0 166,000
Performance stock units, vested in period (116,000) 0
Performance stock units forfeited during year (24,000) (26,000)
Nonvested restricted shares or performance stock units, end of year 0 140,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 25,726  
2007 Stock Incentive Plan    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 22.10%