Loan Sales and Servicing - Sales in the Secondary Market (Details) - Originated For Sale In The Secondary Market - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Residential real estate loans originated for sale in the secondary market sold	[1]	$ 172,206	$ 128,911
Net gains recognized on sales of residential real estate loans originated for sale in the secondary market	[2]	$ 4,621	$ 5,768

[1] Includes loans originated for sale where the Company retained servicing responsibilities.

[2] Net gains were recorded in mortgage banking income in the Company's Unaudited Condensed Consolidated Statements of Income.