Borrowing Facilities (Narrative) (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Line of Credit Facility, expiration date	Jun. 30, 2019
Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum amount of Credit Facility	$ 75,000	$ 75,000
Amount borrowed by the Company under the facility		$ 1,200
Amended Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum amount of Credit Facility	$ 55,000
Line of Credit Facility, expiration date	Jun. 30, 2021
Warehouse Facility [Member]
Line of Credit Facility [Line Items]
Amount borrowed by the Company under the facility	$ 0