Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2020

Fair Value Disclosures [Abstract]

Fair value of Mortgage Loans Held for Sale

The following table presents a summary of mortgage loans held for sale accounted for under the fair value option:

(Dollars in thousands)
December 31,	2020	2019
Aggregate fair value	$61,614	$27,833
Aggregate principal balance	59,313	27,168
Difference between fair value and principal balance	$2,301	$665

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following tables present the balances of assets and liabilities reported at fair value on a recurring basis:

(Dollars in thousands)	Total	Quoted Prices in Active Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
December 31, 2020
Assets:
Available for sale debt securities:
Obligations of U.S. government-sponsored enterprises	$131,669	$—	$131,669	$—
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	740,305	—	740,305	—
Individual name issuer trust preferred debt securities	12,669	—	12,669	—
Corporate bonds	9,928	—	9,928	—
Mortgage loans held for sale	61,614	—	61,614	—
Derivative assets	83,028	—	83,028	—
Total assets at fair value on a recurring basis	$1,039,213	$—	$1,039,213	$—
Liabilities:
Derivative liabilities	$81,123	$—	$81,123	$—
Total liabilities at fair value on a recurring basis	$81,123	$—	$81,123	$—

(Dollars in thousands)	Total	Quoted Prices in Active Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
December 31, 2019
Assets:
Available for sale debt securities:
Obligations of U.S. government-sponsored enterprises	$157,648	$—	$157,648	$—
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	719,080	—	719,080	—
Individual name issuer trust preferred debt securities	12,579	—	12,579	—
Corporate bonds	10,183	—	10,183	—
Mortgage loans held for sale	27,833	—	27,833	—
Derivative assets	28,864	—	28,864	—
Total assets at fair value on a recurring basis	$956,187	$—	$956,187	$—
Liabilities:
Derivative liabilities	$29,381	$—	$29,381	$—
Total liabilities at fair value on a recurring basis	$29,381	$—	$29,381	$—

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

The following table presents the carrying value of assets held at December 31, 2020, which were written down to fair value during the year ended December 31, 2020:

(Dollars in thousands)	Total	Quoted Prices in Active Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Assets:
Collateral dependent individually analyzed loans	$1,720	$—	$—	$1,720
Loan servicing rights	7,434	—	—	7,434
Total assets at fair value on a nonrecurring basis	$9,154	$—	$—	$9,154

The following table presents the carrying value of assets held at December 31, 2019, which were written down to fair value during the year ended December 31, 2019:

(Dollars in thousands)	Total	Quoted Prices in Active Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Assets:
Collateral dependent impaired loans	$1,448	$—	$—	$1,448
Property acquired through foreclosure or repossession	1,109	—	—	1,109
Total assets at fair value on a nonrecurring basis	$2,557	$—	$—	$2,557

Qualitative Information About Level 3 Assets Measured at Fair Value on a Nonrecurring Basis

The following tables present valuation techniques and unobservable inputs for assets measured at fair value on a nonrecurring basis for which the Corporation has utilized Level 3 inputs to determine fair value:

(Dollars in thousands)	Fair Value	Valuation Technique	Unobservable Input	Range of Inputs Utilized (Weighted Average)
December 31, 2020
Collateral dependent individually analyzed loans	$1,720	Appraisals of collateral	Discount for costs to sell	0% - 25% (11%)
			Appraisal adjustments	0% - 100% (15%)
Loan servicing rights	7,434	Discounted Cash Flow	Discount Rate	10% - 14% (10%)
			Prepayment rates	18% - 42% (21%)

(Dollars in thousands)	Fair Value	Valuation Technique	Unobservable Input	Range of Inputs Utilized (Weighted Average)
December 31, 2019
Collateral dependent impaired loans	$1,448	Appraisals of collateral	Discount for costs to sell	0% - 20% (5%)
			Appraisal adjustments	0% - 100% (67%)
Property acquired through foreclosure or repossession	1,109	Appraisals of collateral	Discount for costs to sell	12%
			Appraisal adjustments	22%

Carrying Amounts, Estimated Fair Values and Fair Value Hierarchy of Financial Instruments

The estimated fair values and related carrying amounts for financial instruments for which fair value is only disclosed are presented below as of the periods indicated. The tables exclude financial instruments for which the carrying value approximates fair value such as cash and cash equivalents, FHLB stock, accrued interest receivable, bank-owned life insurance, non-maturity deposits and accrued interest payable.

(Dollars in thousands)	Carrying Amount	Total Fair Value	Quoted Prices in Active Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
December 31, 2020
Financial Assets:
Loans, net of allowance for credit losses on loans	$4,151,884	$4,114,628	$—	$—	$4,114,628
Financial Liabilities:
Time deposits	$1,296,396	$1,302,128	$—	$1,302,128	$—
FHLB advances	593,859	602,000	—	602,000	—
Junior subordinated debentures	22,681	19,422	—	19,422	—

(Dollars in thousands)	Carrying Amount	Total Fair Value	Quoted Prices in Active Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
December 31, 2019
Financial Assets:
Loans, net of allowance for loan losses	$3,865,985	$3,869,192	$—	$—	$3,869,192
Financial Liabilities:
Time deposits	$1,069,323	$1,082,830	$—	$1,082,830	$—
FHLB advances	1,141,464	1,145,242	—	1,145,242	—
Junior subordinated debentures	22,681	19,628	—	19,628	—