Investment Securities (Held-to-maturity Securities with Unrealized Loss) (Details) $ in Thousands	Sep. 30, 2019 USD ($) securities	Dec. 31, 2018 USD ($) securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	$ 7,885	$ 0
Less than 12 months, unrealized loss	$ 14	$ 0
Less than 12 months, no. of securities | securities	1	0
12 months or more, fair value	$ 899	$ 16,566
12 months or more, unrealized loss	$ 27	$ 682
12 months or more, no. of securities | securities	1	6
Total fair value	$ 8,784	$ 16,566
Total unrealized loss	41	682
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value	7,885	0
Less than 12 months, unrealized loss	$ 14	$ 0
Less than 12 months, no. of securities | securities	1	0
12 months or more, fair value	$ 899	$ 13,102
12 months or more, unrealized loss	$ 27	$ 632
12 months or more, no. of securities | securities	1	5
Total fair value	$ 8,784	$ 13,102
Total unrealized loss	41	632
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Less than 12 months, fair value		0
Less than 12 months, unrealized loss		$ 0
Less than 12 months, no. of securities | securities		0
12 months or more, fair value		$ 3,464
12 months or more, unrealized loss		$ 50
12 months or more, no. of securities | securities		1
Total fair value		$ 3,464
Total unrealized loss	$ 0	$ 50