Derivative Instruments and Other Hedging Activities (Tables)

12 Months Ended

Dec. 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)		December 31, 2018		December 31, 2017			December 31, 2018		December 31, 2017
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	Other assets	$	3,469	$	—	Other liabilities	$	—	$	—
Total derivatives designated as hedging instruments under ASC Topic 815		$	3,469	$	—		$	—	$	—
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts:
Customer swaps - upstream	Other assets	$	474	$	12,318	Other liabilities	$	191	$	3,873
Customer swaps - downstream	Other assets	16,946		8,128		Other liabilities	17,812		12,318
Foreign exchange contracts	Other assets	18		7		Other liabilities	18		7
Forward sales contracts	Other assets	630		136		Other liabilities	750		279
Written and purchased options	Other assets	5,490		10,654		Other liabilities	3,310		8,656
Other contracts	Other assets	21		22		Other liabilities	43		21
Total derivatives not designated as hedging instruments under ASC Topic 815		$	23,579	$	31,265		$	22,124	$	25,154
Total		$	27,048	$	31,265		$	22,124	$	25,154

	Derivative Assets - Notional Amount				Derivative Liabilities - Notional Amount
(Dollars in thousands)	December 31, 2018		December 31, 2017		December 31, 2018		December 31, 2017
Derivatives designated as hedging instruments under ASC Topic 815:
Interest rate contracts	$	408,500	$	—	$	—	$	108,500
Total derivatives designated as hedging instruments under ASC Topic 815	$	408,500	$	—	$	—	$	108,500
Derivatives not designated as hedging instruments under ASC Topic 815:
Interest rate contracts:
Customer swaps - upstream	$	919,653	$	644,282	$	701,257	$	574,182
Customer swaps - downstream	701,257		574,182		919,653		644,282
Foreign exchange contracts	1,202		268		1,202		268
Forward sales contracts	1,140		82,347		143,179		142,578
Written and purchased options	229,333		278,638		140,645		165,198
Other contracts	50,527		29,755		85,623		86,744
Total derivatives not designated as hedging instruments under ASC Topic 815	$	1,903,112	$	1,609,472	$	1,991,559	$	1,613,252
Total	$	2,311,612	$	1,609,472	$	1,991,559	$	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.

	December 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 designated as hedging instruments	$	3,469	$	—		$	—	$	3,469
Interest rate contracts not designated as hedging instruments	17,420		(619		)	—		16,801
Written and purchased options	3,285		—			—		3,285
Total derivative assets subject to master netting arrangements	$	24,174	$	(619	)	$	—	$	23,555
Derivative liabilities
Interest rate contracts not designated as hedging instruments	$	18,003	$	(619	)	$	—	$	17,384
Written and purchased options	3,285		—			—		3,285
Total derivative liabilities subject to master netting arrangements	$	21,288	$	(619	)	$	—	$	20,669

^{(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 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.

	December 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 designated as hedging instruments	$	3,469	$	—		$	—	$	3,469
Interest rate contracts not designated as hedging instruments	17,420		(619		)	—		16,801
Written and purchased options	3,285		—			—		3,285
Total derivative assets subject to master netting arrangements	$	24,174	$	(619	)	$	—	$	23,555
Derivative liabilities
Interest rate contracts not designated as hedging instruments	$	18,003	$	(619	)	$	—	$	17,384
Written and purchased options	3,285		—			—		3,285
Total derivative liabilities subject to master netting arrangements	$	21,288	$	(619	)	$	—	$	20,669

^{(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 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 December 31, 2018, 2017, and 2016, and for the years then ended, information pertaining to the effect of the hedging instruments on the consolidated financial statements is as follows:

		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									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)
		Total		Including Component		Excluding Component				Total			Including Component			Excluding Component					Total		Including Component		Excluding Component
(Dollars in thousands)		For the Year Ended December 31,
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships		2018								2018										2018
	Interest rate contracts	$	4,416	$	4,835	$	(419	)	Interest expense	$	(196	)	$	(150	)	$	(46	)	Interest expense		$	—	$	—	$	—
Total		$	4,416	$	4,835	$	(419	)		$	(196	)	$	(150	)	$	(46	)			$	—	$	—	$	—

														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 Years Ended December 31,
Derivatives in ASC Topic 815 Cash Flow Hedging Relationships		2017			2016				2017			2016			2017		2016
	Interest rate contracts	$	(611	)	$	(328	)	Interest expense	$	(390	)	$	50	Interest expense	$	—	$	—
Total		$	(611	)	$	(328	)		$	(390	)	$	50		$	—	$	—

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

	Location of Gain (Loss) Recognized in  Income on Derivatives	Amount of Gain (Loss) Recognized in Income on Derivatives
(Dollars in thousands)		2018			2017			2016
Interest rate contracts (1)	Other income	$	6,962		$	4,750		$	8,830
Foreign exchange contracts	Other income	29			43			15
Forward sales contracts	Mortgage income	4,064			(4,115		)	(1,731		)
Written and purchased options	Mortgage income	180			(2,028		)	(327		)
Other contracts	Other income	(24		)	51			17
Total		$	11,211		$	(1,299	)	$	6,804