Deferred Compensation Awards - Schedule of Recipients of SARs Awards, Grant Date, Units Granted, Exercise Price, Outstanding Shares and Amounts Paid (Details) - Stock Appreciation Rights (SARs) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting terms	4 years
Units Granted (in shares)	935,000
Units Outstanding (in shares)			290,750
Amounts Paid	$ 1,338	$ 796
Q3 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting terms	48 months
Employees below senior management level | Q1 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting terms	12 months
Expiration period	4 years
Key Executive | Q3 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting terms	48 months
Duration of weighted average period to determine exercise price	5 days
Units Granted (in shares)	100,000
Exercise Price (in dollars per share)	$ 1.59
Units Outstanding (in shares)			0
Amounts Paid	$ 0	166
Key Executive | Q4 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting terms	48 months
Duration of weighted average period to determine exercise price	30 days
Units Granted (in shares)	100,000
Exercise Price (in dollars per share)	$ 2.69
Units Outstanding (in shares)			0
Amounts Paid	$ 0	183
Key Executive | Q2 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units Granted (in shares)	300,000
Exercise Price (in dollars per share)	$ 5.13
Units Outstanding (in shares)			85,000
Amounts Paid	$ 705	447
Members of Management | Q1 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units Granted (in shares)	299,000
Exercise Price (in dollars per share)	$ 4.26
Units Outstanding (in shares)			118,000
Amounts Paid	$ 481	0
Members of Management | Q3 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units Granted (in shares)	103,000
Exercise Price (in dollars per share)	$ 9.40
Units Outstanding (in shares)			63,000
Amounts Paid	$ 125	0
Members of Management | Q1 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units Granted (in shares)	33,000
Exercise Price (in dollars per share)	$ 8.99
Units Outstanding (in shares)			24,750
Amounts Paid	$ 27	$ 0
Year One | Key Executive | Q2 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting terms	48 months
Vesting percentage	20.00%
Year One | Members of Management | Q2 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting terms	48 months
Year Two | Key Executive | Q2 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	20.00%
Year Three | Key Executive | Q2 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	20.00%
Year Four | Key Executive | Q2 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	40.00%