Combined Guarantor Subsidiaries - Leases - Right-of-Use Asset and Lease Liability Activity (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($)
ROU Asset
Balance at beginning of period	$ 4,160
Cash reduction	(365)
Noncash increase	172
Balance at end of period	3,967
Lease Liability
Balance at beginning of period	4,074
Cash reduction	(365)
Noncash increase	266
Balance at end of period	3,975
Guarantor Subsidiaries
ROU Asset
Balance at beginning of period	493
Cash reduction	(30)
Noncash increase	26
Balance at end of period	489
Lease Liability
Balance at beginning of period	490
Cash reduction	(30)
Noncash increase	29
Balance at end of period	$ 489