Securities (Schedule of Information Regarding Securities with Unrealized Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS and HTM	$ 0	$ 108,745
Unrealized Losses, AFS and HTM	0	863
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS and HTM	292,392	320,445
Unrealized Losses, AFS and HTM	3,506	13,561
Total
Fair Value, AFS and HTM	292,392	429,190
Unrealized Losses, AFS and HTM	3,506	14,424
Government-sponsored enterprise securities
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS	0	4,921
Unrealized Losses, AFS	0	78
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS	13,962	13,682
Unrealized Losses, AFS	38	318
Total
Fair Value, AFS	13,962	18,603
Unrealized Losses, AFS	38	396
Mortgage-backed securities
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS and HTM	0	82,525
Unrealized Losses, AFS and HTM	0	351
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS and HTM	276,614	294,305
Unrealized Losses, AFS and HTM	3,337	12,939
Total
Fair Value, AFS and HTM	276,614	376,830
Unrealized Losses, AFS and HTM	3,337	13,290
Corporate bonds
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, AFS	0	20,704
Unrealized Losses, AFS	0	433
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, AFS	870	5,817
Unrealized Losses, AFS	130	256
Total
Fair Value, AFS	870	26,521
Unrealized Losses, AFS	130	689
State and local governments
Securities in an Unrealized Loss Position for Less than 12 Months
Fair Value, HTM	0	595
Unrealized Losses, HTM	0	1
Securities in an Unrealized Loss Position for More than 12 Months
Fair Value, HTM	946	6,641
Unrealized Losses, HTM	1	48
Total
Fair Value, HTM	946	7,236
Unrealized Losses, HTM	$ 1	$ 49