Derivatives (Tables)

12 Months Ended

Dec. 31, 2017

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Schedule of Derivative Financial Instruments

The following table provides details on the Company’s derivative financial instruments as of the dates presented:

	December 31, 2017
	Notional Amount		Asset		Liability
Not designated as hedging:
Interest rate contracts	$	146,754	$	1,146	$	1,146
Forward commitments		870,574		—		553
Interest rate-lock commitments		504,156		6,768		—
Futures contracts		283,000		315		—
Option contracts		6,000		29		—
Total	$	1,810,484	$	8,258	$	1,699

	December 31, 2016
	Notional Amount		Asset		Liability
Not designated as hedging:
Interest rate contracts	$	22,243	$	586	$	586
Forward commitments		829,000		12,731		—
Interest rate-lock commitments		532,920		6,428		—
Futures contracts		—		—		—
Total	$	1,384,163	$	19,745	$	586

	December 31, 2017
	Notional Amount		Asset		Liability
Designated as hedging:
Interest rate swaps	$	130,000	$	1,432	$	—
Total	$	130,000	$	1,432	$	—

Schedule of Gains (Losses) Included in the Consolidated Statements of Income Related to Derivative Financial Instruments

Gains (losses) included in the Consolidated Statements of Income related to the Company’s derivative financial instruments were as follows:

	Year Ended December 31,
	2017			2016		2015
Not designated as hedging instruments (included in mortgage banking income):
Interest rate lock commitments	$	340		$	835	$	2,073
Forward commitments		(11,987	)		10,497		(3,600	)
Futures contracts		315			—		—
Option contracts		22			—		—
Total	$	(11,310	)	$	11,332	$	(1,527	)

	Year Ended December 31,
	2017		2016			2015
Designated as hedging:
Amount of gain reclassified from other comprehensive    income and recognized in interest expense on long-term debt	$	168	$	—		$	—
Included in loss on sale of mortgage servicing rights		—		(5,569	)		—
Total	$	168	$	(5,569	)	$	—

The following discloses the amount included in other comprehensive income, net of tax, for derivative instruments designated as cash flow hedges for the periods presented:

	Year Ended December 31,
	2017		2016		2015
Designated as hedging:
Amount of gain recognized in other comprehensive    income, net of tax	$	685	$	—	$	—