Investments in Available for Sale Securities Purchases, Proceeds and Gains & Losses (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014
Available-for-sale Securities [Abstract]
Purchases of available-for-sale securities	$ 33,324	$ 61,697
Proceeds from maturities, calls, and prepayments of available for sale securities	12,187	28,592	$ 0
Proceeds from sale of available-for-sale securities	9,105	10,838
Gain (loss) on sale of available-for-sale securities	$ (56)	$ (56)