Derivative Financial Instruments - Gain (Loss) Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Asset Derivatives | Interest Rate Lock Commitments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 275	$ (341)	$ 1,095	$ (168)
Forward contracts | Asset Derivatives | Interest Rate Lock Commitments
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	0	289	0	208
Forward contracts | Liability Derivatives
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 526	$ 0	$ 337	$ 0