Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of amounts of non-hedging derivative financial instruments

The following table shows the amounts of non-hedging derivative financial instruments at December 31, 2017 and 2016.

			Asset derivatives			Liability derivatives
(Dollars in thousands)	Notional or contractual amount		Statement of Financial Condition classification	Fair value		Statement of Financial Condition classification	Fair value
Interest rate swap contracts	$	756,550	Other assets	$	5,167	Other liabilities	$	5,262
Loan commitments	8,504		Mortgages held for sale	66		N/A	—
Forward contracts - mortgage loan	19,390		N/A	—		Mortgages held for sale	10
Total - December 31, 2017	$	784,444		$	5,233		$	5,272
Interest rate swap contracts	$	570,004	Other assets	$	6,621	Other liabilities	$	6,743
Loan commitments	5,527		Mortgages held for sale	43		N/A	—
Forward contracts - mortgage loan	16,525		Mortgages held for sale	222		N/A	—
Total - December 31, 2016	$	592,056		$	6,886		$	6,743

Schedule of amounts included in the consolidated statements of income for non-hedging derivative financial instruments

The following table shows the amounts included in the Statements of Income for non-hedging derivative financial instruments at December 31, 2017, 2016 and 2015.

		Gain (loss)
(Dollars in thousands)	Statement of Income classification	2017			2016			2015
Interest rate swap contracts	Other expense	$	26		$	64		$	(8	)
Interest rate swap contracts	Other income	1,585			730			1,045
Loan commitments	Mortgage banking	23			(4		)	45
Forward contracts - mortgage loan	Mortgage banking	(232		)	209			155
Total		$	1,402		$	999		$	1,237

Schedule of offsetting of financial assets and derivative assets

The following table shows the offsetting of financial assets and derivative assets at December 31, 2017 and 2016.

							Gross Amounts Not Offset in the Statement of Financial Condition
(Dollars in thousands)	Gross Amounts of Recognized Assets		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Assets Presented in the Statement of Financial Condition		Financial Instruments		Cash Collateral Received		Net Amount
December 31, 2017
Interest rate swaps	$	5,194	$	27	$	5,167	$	—	$	—	$	5,167
December 31, 2016
Interest rate swaps	$	6,681	$	60	$	6,621	$	—	$	—	$	6,621

Schedule of offsetting of financial liabilities and derivative liabilities

The following table shows the offsetting of financial liabilities and derivative liabilities at December 31, 2017 and 2016.

							Gross Amounts Not Offset in the Statement of Financial Condition
(Dollars in thousands)	Gross Amounts of Recognized Liabilities		Gross Amounts Offset in the Statement of Financial Condition		Net Amounts of Liabilities Presented in the Statement of Financial Condition		Financial Instruments		Cash Collateral Pledged		Net Amount
December 31, 2017
Interest rate swaps	$	5,289	$	27	$	5,262	$	—	$	2,705	$	2,557
Repurchase agreements	149,835		—		149,835		149,835		—		—
Total	$	155,124	$	27	$	155,097	$	149,835	$	2,705	$	2,557
December 31, 2016
Interest rate swaps	$	6,803	$	60	$	6,743	$	—	$	3,794	$	2,949
Repurchase agreements	162,913		—		162,913		162,913		—		—
Total	$	169,716	$	60	$	169,656	$	162,913	$	3,794	$	2,949