Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]

Fair Value Mortgage Loans Held For Sale, Interest Rate Lock Commitments and Commitments to Sell

The following table presents the changes in fair value related to mortgage loans held for sale, interest rate lock commitments and commitments to sell residential real estate mortgage loans, for which the fair value option was elected. Changes in fair values are reported as a component of mortgage banking revenues in the Consolidated Statements of Income.

(Dollars in thousands)
Years ended December 31,	2016			2015			2014
Mortgage loans held for sale		($691	)		($48	)		$598
Interest rate lock commitments	(175		)	28			800
Commitments to sell	942			3			(1,442		)
Total changes in fair value		$76			($17	)		($44	)

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, 2016
Assets:
Securities available for sale:
Obligations of U.S. government agencies and U.S. government-sponsored enterprises		$108,440		$—		$108,440		$—
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	588,085		—		588,085		—
Obligations of states and political subdivisions	14,485		—		14,485		—
Individual name issuer trust preferred debt securities	26,736		—		26,736		—
Corporate bonds	2,166		—		2,166		—
Mortgage loans held for sale	29,434		—		29,434		—
Derivative assets	3,582		—		3,582		—
Total assets at fair value on a recurring basis		$772,928		$—		$772,928		$—
Liabilities:
Derivative liabilities		$4,043		$—		$4,043		$—
Contingent consideration liability (1)	2,047		—		—		2,047
Total liabilities at fair value on a recurring basis		$6,090		$—		$4,043		$2,047

(1) The contingent consideration liability is included in other liabilities in the Consolidated Balance Sheets.

(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, 2015
Assets:
Securities available for sale:
Obligations of U.S. government agencies and U.S. government-sponsored enterprises		$77,015		$—		$77,015		$—
Mortgage-backed securities issued by U.S. government agencies and U.S. government-sponsored enterprises	234,856		—		234,856		—
Obligations of states and political subdivisions	36,080		—		36,080		—
Individual name issuer trust preferred debt securities	25,138		—		25,138		—
Corporate bonds	1,955		—		1,955		—
Mortgage loans held for sale	33,969		—		33,969		—
Derivative assets	9,490		—		9,490		—
Total assets at fair value on a recurring basis		$418,503		$—		$418,503		$—
Liabilities:
Derivative liabilities		$10,347		$—		$10,347		$—
Contingent consideration liability (1)	2,945		—		—		2,945
Total liabilities at fair value on a recurring basis		$13,292		$—		$10,347		$2,945

(1) The contingent consideration liability is included in other liabilities in the Consolidated Balance Sheets.

Fair value of Contingent Consideration Rollforward

The following table presents the change in the contingent consideration liability, a Level 3 liability measured at fair value on a recurring basis:

(Dollars in thousands)
Years ended December 31,	2016			2015
Beginning Balance		$2,945			$—
Initial recognition	—			2,904
Change in fair value	(898		)	41
Payments	—			—
Ending Balance		$2,047			$2,945

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

The following table presents the carrying value of assets held at December 31, 2016, which were written down to fair value during the year ended December 31, 2016:

(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		$3,828		$—		$—		$3,828
Property acquired through foreclosure or repossession	605		—		—		605
Total assets at fair value on a nonrecurring basis		$4,433		$—		$—		$4,433

The allowance for loan losses on the collateral dependent impaired loans amounted to $469 thousand at December 31, 2016.

The following table summarizes the carrying value of assets held at December 31, 2015, which were written down to fair value during the year ended December 31, 2015:

(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		$10,545		$—		$—		$10,545
Property acquired through foreclosure or repossession	270		—		—		270
Total assets at fair value on a nonrecurring basis		$10,815		$—		$—		$10,815

The allowance for loan losses on the collateral dependent impaired loans amounted to $2.4 million at December 31, 2015.

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, 2016
Collateral dependent impaired loans		$3,828	Appraisals of collateral	Discount for costs to sell	10% - 20% (15%)
				Appraisal adjustments (1)	0% - 10% (9%)
Property acquired through foreclosure or repossession	605		Appraisals of collateral	Discount for costs to sell	10% - 12% (11%)
				Appraisal adjustments (1)	6% - 50% (24%)

(1) Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property.

(Dollars in thousands)	Fair Value		Valuation Technique	Unobservable Input	Range of Inputs Utilized (Weighted Average)
December 31, 2015
Collateral dependent impaired loans		$10,545	Appraisals of collateral	Discount for costs to sell	0% - 20% (2%)
Property acquired through foreclosure or repossession	270		Appraisals of collateral	Discount for costs to sell	12%
				Appraisal adjustments (1)	32%

(1) Management may adjust appraisal values to reflect market value declines or other discounts resulting from its knowledge of the property.

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

The following tables present the carrying amount, estimated fair value and placement in the fair value hierarchy of the Corporation’s financial instruments. The tables exclude financial instruments for which the carrying value approximates fair value. Financial assets for which the fair value approximates carrying value include cash and cash equivalents, FHLBB stock, accrued interest receivable and bank-owned life insurance. Financial liabilities for which the fair value approximates carrying value include 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, 2016
Financial Assets:
Securities held to maturity		$15,633		$15,920		$—		$15,920		$—
Loans, net of allowance for loan losses	3,208,367		3,218,651		—		—		3,218,651
Financial Liabilities:
Time deposits		$961,613		$962,374		$—		$962,374		$—
FHLBB advances	848,930		852,888		—		852,888		—
Junior subordinated debentures	22,681		16,970		—		16,970		—

(Dollars in thousands)	Carrying Amount		Estimated 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, 2015
Financial Assets:
Securities held to maturity		$20,023		$20,516		$—		$20,516		$—
Loans, net of allowance for loan losses	2,986,058		3,004,782		—		—		3,004,782
Financial Liabilities:
Time deposits		$833,898		$834,574		$—		$834,574		$—
FHLBB advances	378,973		388,275		—		388,275		—
Junior subordinated debentures	22,681		16,468		—		16,468		—