Summary of Significant Accounting Policies (Details)		12 Months Ended
	Jan. 01, 2018 USD ($)	Dec. 31, 2018 USD ($) class_business state	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jan. 01, 2019 USD ($)	Oct. 12, 2018 USD ($)
Accounting Policies [Abstract]
Number of types of business | class_business		2
Number of states in which entity operates | state		50
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unrecognized tax benefits		$ 0	$ 0
Income tax penalties and interest accrued		0	0
Deferred income taxes		0	$ (419,000)	$ (147,000)
Operating lease rent expense		1,200,000
Senior Unsecured Notes | Senior Unsecured Notes
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Face amount of debt		$ 25,300,000				$ 25,300,000
Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reclassification of previously recognized deferred taxes from accumulated other comprehensive income into accumulated deficit	$ 77,000
Accounting Standards Update 2016-01
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred income taxes	500,000
Accounting Standards Update 2016-01 | Retained Earnings (Accumulated deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adoption of ASU	1,100,000
Accounting Standards Update 2016-01 | Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of adoption of ASU	$ (1,100,000)
Subsequent Event | Scenario, Forecast | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease liability					$ 4,300,000
Right of use asset					$ 4,300,000