Derivative Instruments and Other Hedging Activities (Tables)

3 Months Ended

Mar. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Outstanding Derivative Instruments

Information pertaining to outstanding derivative instruments is as follows:

	Balance Sheet Location	Derivative Assets - Fair Value				Balance Sheet Location	Derivative Liabilities - Fair Value
(Dollars in thousands)		March 31, 2018		December 31, 2017			March 31, 2018		December 31, 2017
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	—	$	—	Other liabilities	$	—	$	—
Total derivatives designated as hedging instruments under ASC Topic 815		$	—	$	—		$	—	$	—
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	5,827	$	20,446	Other liabilities	$	25,771	$	16,191
Foreign exchange contracts	Other assets	2		7		Other liabilities	2		7
Forward sales contracts	Other assets	2,851		136		Other liabilities	703		279
Written and purchased options	Other assets	8,383		10,654		Other liabilities	5,667		8,656
Other contracts	Other assets	9		22		Other liabilities	11		21
Total derivatives not designated as hedging instruments under ASC Topic 815		$	17,072	$	31,265		$	32,154	$	25,154
Total		$	17,072	$	31,265		$	32,154	$	25,154

	Derivative Assets - Notional Amount				Derivative Liabilities - Notional Amount
(Dollars in thousands)	March 31, 2018		December 31, 2017		March 31, 2018		December 31, 2017
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	108,500	$	—	$	—	$	108,500
Total derivatives designated as hedging instruments under ASC Topic 815	$	108,500	$	—	$	—	$	108,500
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	1,356,990	$	1,218,464	$	1,276,990	$	1,218,464
Foreign exchange contracts	628		268		628		268
Forward sales contracts	96,810		82,347		215,918		142,578
Written and purchased options	339,852		278,638		164,341		165,198
Other contracts	29,676		29,755		71,889		86,744
Total derivatives not designated as hedging instruments under ASC Topic 815	$	1,823,956	$	1,609,472	$	1,729,766	$	1,613,252
Total	$	1,932,456	$	1,609,472	$	1,729,766	$	1,721,752

Offsetting Assets

The following table reconciles the gross amounts presented in the consolidated balance sheets to the net amounts that would result in the event of offset.

	March 31, 2018
	Gross Amounts Presented in the Balance Sheet		Gross Amounts Not Offset in the Balance Sheet					Net
(Dollars in thousands)			Derivatives			Collateral  (1)
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts not designated as hedging instruments	$	5,827	$	(548	)	$	—	$	5,279
Written and purchased options	5,656		—			—		5,656
Total derivative assets subject to master netting arrangements	$	11,483	$	(548	)	$	—	$	10,935
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—		$	—	$	—
Interest rate contracts not designated as hedging instruments	25,771		(548		)	—		25,223
Written and purchased options	5,587		—			—		5,587
Total derivative liabilities subject to master netting arrangements	$	31,358	$	(548	)	$	—	$	30,810

^{(1) Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.} 

	December 31, 2017
	Gross Amounts Presented in the Balance Sheet		Gross Amounts Not Offset in the Balance Sheet						Net
(Dollars in thousands)			Derivatives			Collateral (1)
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts not designated as hedging instruments	$	20,446	$	(12,469	)	$	—		$	7,977
Written and purchased options	8,610		—			—			8,610
Total derivative assets subject to master netting arrangements	$	29,056	$	(12,469	)	$	—		$	16,587
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—		$	—		$	—
Interest rate contracts not designated as hedging instruments	16,191		(12,469		)	(552		)	3,170
Total derivative liabilities subject to master netting arrangements	$	16,191	$	(12,469	)	$	(552	)	$	3,170

Offsetting Liabilities

The following table reconciles the gross amounts presented in the consolidated balance sheets to the net amounts that would result in the event of offset.

	March 31, 2018
	Gross Amounts Presented in the Balance Sheet		Gross Amounts Not Offset in the Balance Sheet					Net
(Dollars in thousands)			Derivatives			Collateral  (1)
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts not designated as hedging instruments	$	5,827	$	(548	)	$	—	$	5,279
Written and purchased options	5,656		—			—		5,656
Total derivative assets subject to master netting arrangements	$	11,483	$	(548	)	$	—	$	10,935
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—		$	—	$	—
Interest rate contracts not designated as hedging instruments	25,771		(548		)	—		25,223
Written and purchased options	5,587		—			—		5,587
Total derivative liabilities subject to master netting arrangements	$	31,358	$	(548	)	$	—	$	30,810

^{(1) Consists of cash collateral recorded at cost, which approximates fair value, and investment securities.} 

	December 31, 2017
	Gross Amounts Presented in the Balance Sheet		Gross Amounts Not Offset in the Balance Sheet						Net
(Dollars in thousands)			Derivatives			Collateral (1)
Derivatives subject to master netting arrangements
Derivative assets
Interest rate contracts not designated as hedging instruments	$	20,446	$	(12,469	)	$	—		$	7,977
Written and purchased options	8,610		—			—			8,610
Total derivative assets subject to master netting arrangements	$	29,056	$	(12,469	)	$	—		$	16,587
Derivative liabilities
Interest rate contracts designated as hedging instruments	$	—	$	—		$	—		$	—
Interest rate contracts not designated as hedging instruments	16,191		(12,469		)	(552		)	3,170
Total derivative liabilities subject to master netting arrangements	$	16,191	$	(12,469	)	$	(552	)	$	3,170

Effect of Derivatives on the Consolidated Financial Statements

At March 31, 2018 and 2017, and for the three months then ended, information pertaining to the effect of the hedging instruments on the consolidated financial statements is as follows:

													Location of Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	Amount of Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)
			Amount of Gain (Loss) Recognized in OCI, net of taxes			Location of Gain (Loss) Reclassified from Accumulated OCI into Income		Amount of Gain (Loss) Reclassified from Accumulated OCI into Income, net of taxes
(Dollars in thousands)
			For the Three Months Ended March 31
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships		2018		2017			2018			2017				2018		2017
	Interest rate contracts	$	2,549	$	73	Interest expense	$	(116	)	$	(45	)	Interest expense	$	—	$	—
Total		$	2,549	$	73		$	(116	)	$	(45	)		$	—	$	—

Information pertaining to the effect of derivatives not designated as hedging instruments on the consolidated financial statements as of March 31, is as follows:

	Location of Gain (Loss) Recognized in  Income on Derivatives	Amount of Gain (Loss) Recognized in Income on Derivatives
		For the Three Months Ended March 31
(Dollars in thousands)		2018			2017
Interest rate contracts (1)	Other income	$	1,049		$	1,117
Foreign exchange contracts	Other income	5			7
Forward sales contracts	Mortgage income	3,387			(360		)
Written and purchased options	Mortgage income	648			655
Other contracts	Other income	(3		)	4
Total		$	5,086		$	1,423