Deposits - (Summary of Time Deposits Based Upon Contractual Maturity) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deposits [Abstract]
Time Deposits - Three months or less	$ 200,054	$ 214,724
Time Deposits - Over 3 months through 6 months	205,875	200,771
Time Deposits - Over 6 months through 12 months	382,852	391,750
Time Deposits - Over 12 months through 24 months	244,135	271,353
Time Deposits - Over 24 months through 36 months	76,865	65,306
Time Deposits - Over 36 months through 48 months	50,921	36,955
Time Deposits - Over 48 months through 60 months	7,303	7,942
Time Deposits - Thereafter	4,041	5,082
Time Deposits, Total	$ 1,172,046	$ 1,193,883
Three months or less, Weighted Average Rate	0.59%	0.53%
Over 3 months through 6 months, Weighted Average Rate	0.70%	0.52%
Over 6 months through 12 months, Weighted Average Rate	0.76%	0.68%
Over 12 months through 24 months, Weighted Average Rate	0.90%	0.81%
Over 24 months through 36 months, Weighted Average Rate	1.32%	1.25%
Over 36 months through 48 months, Weighted Average Rate	1.44%	1.39%
Over 48 months through 60 months, Weighted Average Rate	1.32%	1.08%
Thereafter, Weighted Average Rate	1.19%	1.48%
Total time deposits, Weighted Average Rate	0.82%	0.72%