Other Assets (Schedule of Other Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other Assets [Abstract]
Nonmarketable investment securities	$ 1,650	$ 1,621
Accrued interest receivable	2,473	2,458
Deferred income taxes	7,077	12,132
Prepaid expenses	1,647	1,039
Other assets	7,438	6,670
Total	$ 20,285	$ 23,920