Derivative Instruments and Other Hedging Activities (Tables)

9 Months Ended

Sep. 30, 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)		September 30, 2018		December 31, 2017			September 30, 2018		December 31, 2017
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	48	$	—	Other liabilities	$	—	$	—
Total derivatives designated as hedging instruments under ASC Topic 815		$	48	$	—		$	—	$	—
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	3,665	$	20,446	Other liabilities	$	37,417	$	16,191
Foreign exchange contracts	Other assets	13		7		Other liabilities	13		7
Forward sales contracts	Other assets	1,084		136		Other liabilities	44		279
Written and purchased options	Other assets	7,754		10,654		Other liabilities	5,282		8,656
Other contracts	Other assets	6		22		Other liabilities	8		21
Total derivatives not designated as hedging instruments under ASC Topic 815		$	12,522	$	31,265		$	42,764	$	25,154
Total		$	12,570	$	31,265		$	42,764	$	25,154

	Derivative Assets - Notional Amount				Derivative Liabilities - Notional Amount
(Dollars in thousands)	September 30, 2018		December 31, 2017		September 30, 2018		December 31, 2017
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	258,500	$	—	$	—	$	108,500
Total derivatives designated as hedging instruments under ASC Topic 815	$	258,500	$	—	$	—	$	108,500
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	1,489,111	$	1,218,464	$	1,489,111	$	1,218,464
Foreign exchange contracts	933		268		933		268
Forward sales contracts	169,276		82,347		21,684		142,578
Written and purchased options	275,473		278,638		143,912		165,198
Other contracts	33,570		29,755		62,142		86,744
Total derivatives not designated as hedging instruments under ASC Topic 815	$	1,968,363	$	1,609,472	$	1,717,782	$	1,613,252
Total	$	2,226,863	$	1,609,472	$	1,717,782	$	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.

	September 30, 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 designated as hedging instruments	$	48	$	—		$	—	$	48
Interest rate contracts not designated as hedging instruments	3,665		(248		)	—		3,417
Written and purchased options	5,267		—			—		5,267
Total derivative assets subject to master netting arrangements	$	8,980	$	(248	)	$	—	$	8,732
Derivative liabilities
Interest rate contracts not designated as hedging instruments	$	37,417	$	(248	)	$	—	$	37,169
Written and purchased options	5,267		—			—		5,267
Total derivative liabilities subject to master netting arrangements	$	42,684	$	(248	)	$	—	$	42,436

^{(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

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

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.

	September 30, 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 designated as hedging instruments	$	48	$	—		$	—	$	48
Interest rate contracts not designated as hedging instruments	3,665		(248		)	—		3,417
Written and purchased options	5,267		—			—		5,267
Total derivative assets subject to master netting arrangements	$	8,980	$	(248	)	$	—	$	8,732
Derivative liabilities
Interest rate contracts not designated as hedging instruments	$	37,417	$	(248	)	$	—	$	37,169
Written and purchased options	5,267		—			—		5,267
Total derivative liabilities subject to master netting arrangements	$	42,684	$	(248	)	$	—	$	42,436

^{(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

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

Effect of Derivatives on the Consolidated Financial Statements

At September 30, 2018 and 2017, and for the three and nine 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 Derivatives (Amount Excluded from Effectiveness Testing)	Amount of Gain (Loss) Recognized in Income on Derivatives (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 September 30,
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships		2018		2017				2018			2017				2018		2017
	Interest rate contracts	$	818	$	(158	)	Interest expense	$	(22	)	$	(101	)	Interest expense	$	—	$	—
Total		$	818	$	(158	)		$	(22	)	$	(101	)		$	—	$	—

														Location of Gain (Loss) Recognized in Income on Derivatives (Amount Excluded from Effectiveness Testing)	Amount of Gain (Loss) Recognized in Income on Derivatives (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 Nine Months Ended September 30,
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships		2018		2017				2018			2017				2018		2017
	Interest rate contracts	$	4,762	$	(1,081	)	Other income (expense)	$	(178	)	$	(249	)	Other income (expense)	$	—	$	—
Total		$	4,762	$	(1,081	)		$	(178	)	$	(249	)		$	—	$	—

Information pertaining to the effect of derivatives not designated as hedging instruments on the consolidated financial statements as of September 30, 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 September 30,						For the Nine Months Ended September 30,
(Dollars in thousands)		2018			2017			2018			2017
Interest rate contracts (1)	Other income	$	2,586		$	743		$	5,093		$	3,159
Foreign exchange contracts	Other income	7			24			17			38
Forward sales contracts	Mortgage income	948			(2,007		)	4,563			(3,893		)
Written and purchased options	Mortgage income	(692		)	(462		)	473			(1,393		)
Other contracts	Other income	1			8			(4		)	17
Total		$	2,850		$	(1,694	)	$	10,142		$	(2,072	)

^{(1) Includes fees associated with customer interest rate contracts.}