Long-Term Debt - Narrative (Details)		12 Months Ended
	Dec. 18, 2015 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Interest Paid, Excluding Capitalized Interest, Operating Activities		$ 27,600,000	$ 33,000,000.0
Total leverage ratio through December 31, 2019	3.25
Total leverage ratio thereafter	3.00
Debt service coverage ratio, actual		5.8
Minimum liquidity balance	$ 25,000,000	$ 25,000,000
Maximum
Debt Instrument [Line Items]
Amended 2016 credit agreement, limit of dividends paid, distributions and redemption of capital stock		$ 25,000,000
Amended 2016 credit agreement, limit of consolidated net income (as a percent)		60.00%
Total leverage ratio from closing date through December 31, 2018	3.50
Minimum
Debt Instrument [Line Items]
Debt service coverage ratio, actual	2.00
Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 75,000,000
Term of credit facility	5 years
Term loan A-1
Debt Instrument [Line Items]
Quarterly principal payment period two		$ 7,300,000
Quarterly principal payment period three		$ 10,900,000
Term loan A-1 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		1.50%
Term loan A-2
Debt Instrument [Line Items]
Quarterly principal payment period one		$ 1,200,000
Term loan A-2 | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%