Equity Compensation and Employee Benefit Plans - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
	May 10, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 30, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Share price					$ 8.71
Employer matching contribution, percent of match		50.00%
Employer matching contribution, percent of employees' gross pay		4.00%
Employer matching contribution, vesting term		2 years
Employer discretionary contribution amount		$ 0.8
Restricted Stock
Defined Benefit Plan Disclosure [Line Items]
Vesting period		4 years
Unrecognized compensation cost related to unvested restricted stock awards		$ 3.1
Period for recognition		2 years 3 months 18 days
Incentive Plan
Defined Benefit Plan Disclosure [Line Items]
Number of common shares granted		500,000
Number of additional shares available for issuance	500,000
Number of remaining shares available for grant		525,601
Number of options outstanding		0	0	0		15,610
Minimum | Employee Stock Option
Defined Benefit Plan Disclosure [Line Items]
Vesting period		3 years
Expiration period		3 years
Maximum | Employee Stock Option
Defined Benefit Plan Disclosure [Line Items]
Vesting period		4 years
Expiration period		10 years