Disclosures about fair value of assets and liabilities (Tables)

6 Months Ended

Jun. 30, 2013

Disclosures about Fair Value of Assets and Liabilities and Fair Value of Financial Instrument [Abstract]

Fair value measurements of assets and liabilities recognized on a recurring basis

				Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs			Significant Unobservable Inputs
	Fair Value			(Level 1)		(Level 2)			(Level 3)
June 30, 2013
Available-for-sale securities
U.S. Treasury and federal agencies	$	38,607		$	—	$	38,607		$	—
State and municipal		180,367			—		180,367			—
Federal agency collateralized mortgage obligations		108,803			—		108,803			—
Federal agency mortgage-backed pools		153,077			—		153,077			—
Private labeled mortgage-backed pools		1,554			—		1,554			—
Corporate notes		45			—		45			—
Total available-for-sale securities		482,453			—		482,453			—
Hedged loans		83,545			—		83,545			—
Forward sale commitments		450			—		450			—
Interest rate swap agreements		(3,842	)		—		(3,842	)		—
Commitments to originate loans		—			—		—			—
December 31, 2012
Available-for-sale securities
U.S. Treasury and federal agencies	$	51,779		$	—	$	51,779		$	—
State and municipal		172,905			—		172,905			—
Federal agency collateralized mortgage obligations		96,831			—		96,831			—
Federal agency mortgage-backed pools		159,204			—		159,204			—
Private labeled mortgage-backed pools		2,031			—		2,031			—
Corporate notes		51			—		51			—
Total available-for-sale securities		482,801			—		482,801			—
Hedged loans		81,018			—		81,018			—
Forward sale commitments		858			—		858			—
Interest rate swap agreements		(7,707	)		—		(7,707	)		—
Commitments to originate loans		—			—		—			—

Schedule of fair value transfer among levels

	Quoted Prices
	in Active		Significant
	Markets for		Other			Significant
	Identical		Observable			Unobservable		Reason
	Assets		Inputs			Inputs		for
December 31, 2012	(Level 1)		(Level 2)			(Level 3)		Transfer
Transfers to level:
Hedged loans	$	—	$	59,911		$	—		(a	)
Forward sale commitments		—		510			—		(b	)
Interest rate swap agreements		—		(6,464	)		—		(a	)
Commitments to originate loans		—		(71	)		—		(b	)
Total transfers to level	$	—	$	53,886		$	—

(a) - Valuation determined by widely accepted techniques including discounted cash flow analysis on expected cash flows of each derivative and observable market rate inputs such as yield curves and contractual terms on each instrument.

(b) - Valuation determined by quoted prices for similar loans in the secondary market with an expected fallout rate (interest rate locked pipeline loans not expected to close). Fallout rate is not considered a significant input to the fair value in its entirety.

Reconciliation of the beginning and ending balances of recurring fair value measurements recognized in the accompanying condensed consolidated balance sheet using significant unobservable (Level 3) inputs

	Hedged Loans			Forward Sale Commitments			Interest Rate Swaps			Commitments to Originate Loans
Beginning balance December 31, 2011	$	54,362		$	662		$	(7,101	)	$	—
Total realized and unrealized gains and losses
Included in net income		(74	)		(152	)		74			(71	)
Included in other comprehensive income, gross		—			—			563			—
Purchases, issuances, and settlements		6,114			—			—			—
Principal payments		(491	)		—			—			—
Transfers out to Level 2		(59,911	)		(510	)		6,464			71
Ending balance December 31, 2012	$	—		$	—		$	—		$	—

Realized gains and losses included in net income for the periods in the condensed consolidated statements of income

	Three Months Ended June 30						Six Months Ended June 30
	2013			2012			2013			2012
Non Interest Income Total gains and losses from:	(Unaudited)			(Unaudited)			(Unaudited)			(Unaudited)
Hedged loans	$	(1,444	)	$	298		$	(1,846	)	$	224
Fair value interest rate swap agreements		1,444			(298	)		1,846			(224	)
Derivative loan commitments		(396	)		503			(408	)		280
	$	(396	)	$	503		$	(408	)	$	280

Other assets measured at fair value on a nonrecurring basis

			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	Fair Value		(Level 1)		(Level 2)		(Level 3)
June 30, 2013
Impaired loans	$	6,992	$	—	$	—	$	6,992
Mortgage servicing rights		5,892		—		—		5,892
December 31, 2012
Impaired loans	$	8,652	$	—	$	—	$	8,652
Mortgage servicing rights		5,145		—		—		5,145

Qualitative information about unobservable inputs used in recurring and nonrecurring Level 3 fair value measurements, other than goodwill

	Fair Value at June 30, 2013		Valuation Technique	Unobservable Inputs	Range (Weighted Average)
Impaired loans	$	6,992	Collateral based measurement	Discount to reflect current market conditions and ultimate collectability	10% - 15% (12%)
Mortgage servicing rights	$	5,892	Discounted cashflows	Discount rate, Constant prepayment rate, Probably of default	10% - 15% (12%), 4% - 7% (4.6%), 1% - 10% (4.5%)
	Fair Value at December 31, 2012		Valuation Technique	Unobservable Inputs	Range (Weighted Average)
Impaired loans	$	8,652	Collateral based measurement	Discount to reflect current market conditions and ultimate collectability	10% - 15% (12%)
Mortgage servicing rights	$	5,145	Discounted cashflows	Discount rate, Constant prepayment rate, Probably of default	10% - 15% (12%), 4% - 7% (4.6%), 1% - 10% (4.5%)