Derivatives - Schedule of Gains (Losses) Included in the Consolidated Statements of Income Related to Derivative Financial Instruments (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivatives, Fair Value [Line Items]
Reclassification adjustment for gain on hedging activities, tax	$ (42,000)	$ 1,000	$ (75,000)	$ 2,000
Amount of (loss) gain recognized in other comprehensive income, net of tax	(564,000)		(895,000)
Amount of (loss) gain recognized in other comprehensive income, net of tax		198,000		1,469,000
Not designated as hedging: | Mortgage Banking Income
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	749	(1,456)	109,000	4,869,000
Designated as hedging:
Derivatives, Fair Value [Line Items]
Total cash flow hedge gain (loss) and derivative excluded component increase (decrease)	158,000	12,000	307,000	37,000
Designated as hedging: | Interest Expense on Borrowings
Derivatives, Fair Value [Line Items]
Amount of gain (loss) reclassified from other comprehensive income and recognized in interest expense on borrowings	119,000	(4,000)	213,000	(7,000)
Gain included in interest expense on borrowings	39,000	16,000	94,000	44,000
Interest rate-lock commitments | Not designated as hedging: | Mortgage Banking Income
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	1,875	(684)	3,755,000	2,727,000
Forward commitments | Not designated as hedging: | Mortgage Banking Income
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	(5,264)	635	(9,668,000)	5,953,000
Futures contracts | Not designated as hedging: | Mortgage Banking Income
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	4,107	(1,369)	5,978,000	(3,816,000)
Option contracts | Not designated as hedging: | Mortgage Banking Income
Derivatives, Fair Value [Line Items]
Gains (losses) on derivative financial instruments	$ 31	$ (38)	$ 44,000	$ 5,000