Fair Value Measurements (Aggregate Fair Value, Contractual Balance, and Gain or Loss for Loans Held-For-Sale) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Fair Value Disclosures [Abstract]
Aggregate fair value	$ 81,830	$ 10,327
Contractual balance	81,009	10,366
Unrealized gain (loss)	$ 821	$ (39)