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Transactions With Affiliates (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Deposits	$ 4,345,697		$ 4,345,697		$ 3,935,714
Legal expense	1,466	$ 1,610	4,324	$ 5,811
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Deposits	0		0		4,700
Directors, Executive Officers, Principal Stockholders and Affiliates [Member] \| Loans, Net Of Deferred Loan Fees And Costs [Member]
Related Party Transaction [Line Items]
Due from related parties	2,000		2,000		2,000
J.V.B. Financial Group, LLC [Member]
Related Party Transaction [Line Items]
Repurchase agreements outstanding	$ 0		0		$ 0
J.V.B. Financial Group, LLC [Member] \| SBA Loan [Member]
Related Party Transaction [Line Items]
Payments to acquire available-for-sale securities, debt			1,400
Duane Morris LLP [Member]
Related Party Transaction [Line Items]
Legal expense			$ 915	$ 2,200