Interest Expense Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Banking and Thrift [Abstract]
Interest Expense, Borrowings	$ 8,945	$ 8,897	$ 27,960	$ 22,675
Amortization of Debt Discount (Premium)	188	172	551	505
Amortization of Debt Issuance Costs	608	693	1,993	2,004
Interest Paid, Capitalized, Investing Activities	(1,005)	(2,440)	(3,234)	(7,111)
Interest Expense	$ 8,736	$ 7,322	$ 27,270	$ 18,073