Revolving Credit Facility (Narrative) (Details) - USD ($) $ in Thousands		9 Months Ended
	Aug. 19, 2019	Sep. 30, 2019
Line of Credit Facility [Line Items]
Payment of revolving credit facility		$ 30,000
Facility A Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 15,000
Line of credit facility, unused capacity, commitment fee percentage		0.25%
Facility A Revolving Credit Sub-Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 5,000
Line of credit facility, unused capacity, commitment fee percentage		1.00%
Facility B Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 30,000
Line of credit facility, unused capacity, commitment fee percentage		0.25%
Payment of revolving credit facility	$ 30,000
London Interbank Offered Rate (LIBOR) [Member] | Facility A Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, interest rate during period		2.50%
London Interbank Offered Rate (LIBOR) [Member] | Facility B Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, unused capacity, commitment fee percentage		3.00%