Stock Compensation Plans - Time-Based Restricted Stock Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Compensation expense
Total Compensation	$ 5,323	$ 6,091	$ 5,372
Restricted Stock, subject to time-based criteria
Compensation expense
Total Compensation	500	2,000	2,100
Unamortized future compensation expense	1,200
Tax benefit related to compensation expense	$ 200	$ 500	$ 600
Summary of restricted stock activity
Nonvested, January 1, 2019	241
Shares vested	(116)
Shares forfeited	4
Nonvested, December 31, 2019	121	241
Weighted average remaining term (years)
Outstanding (years)	1 year 8 months 16 days	2 years 2 months 1 day
Weighted average grant date fair value
Nonvested, January 1, 2019	$ 15.08
Shares vested (per share)	15.20
Shares forfeited (per share)	17.75
Nonvested, December 31, 2019	$ 14.88	$ 15.08
Restricted Stock, subject to time-based criteria | Executive Officer
Plan information
Vesting period (in years)	4 years
Restricted Stock, subject to time-based criteria | Tranche One
Plan information
Vesting period (in years)	1 year
Compensation expense
Vesting rights percentage	25.00%
Restricted Stock, subject to time-based criteria | Share-based Payment Employee
Plan information
Vesting period (in years)	4 years
Time-Based Restricted Stock Units settled in stock
Compensation expense
Total Compensation	$ 1,000
Unamortized future compensation expense	2,100
Tax benefit related to compensation expense	$ 300
Summary of restricted stock activity
Nonvested, January 1, 2019	21
Shares vested	(211)
Shares forfeited	190
Nonvested, December 31, 2019		21
Weighted average remaining term (years)
Outstanding (years)	2 years 6 months 15 days
Weighted average grant date fair value
Nonvested, January 1, 2019	$ 13.69
Shares vested (per share)	13.77
Shares forfeited (per share)	$ 13.78
Nonvested, December 31, 2019		$ 13.69
Time-Based Restricted Stock Units settled in stock | Tranche One
Plan information
Vesting period (in years)	1 year
Compensation expense
Vesting rights percentage	25.00%
Time-Based Restricted Stock Units settled in stock | Share-based Payment Employee
Plan information
Vesting period (in years)	4 years
Time-Based Restricted Stock Units settled in stock | Share-based Payment Employee | Executive Officer
Plan information
Vesting period (in years)	4 years