Fair Value Disclosures (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Disclosures [Abstract]

Financial Assets and Financial Liabilities Measured at Fair Value on Recurring Basis

The following table summarizes financial assets and financial liabilities measured at fair value on a recurring basis as of March 31, 2013, segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value (dollars in thousands):

	Level 1 Inputs		Level 2 Inputs		Level 3 Inputs		Total Fair Value
Available-for-sale investment securities:
U. S. Treasury securities	$	6,039	$	—	$	—	$	6,039
Obligations of U. S. government sponsored-enterprises and agencies		16,844		176,520		—		193,364
Obligations of states and political subdivisions		86,393		831,522		—		917,915
Corporate bonds		—		113,067		—		113,067
Residential mortgage-backed securities		37,972		578,594		—		616,566
Commercial mortgage-backed securities		10,556		96,489		—		107,045
Other securities		4,155		—		—		4,155
Total	$	161,959	$	1,796,192	$	—	$	1,958,151

Other Real Estate Owned

The following table presents other real estate owned that were re-measured subsequent to their initial transfer to other real estate owned (dollars in thousands):

	Three months ended March 31,
	2013			2012
Carrying value of other real estate owned prior to re-measurement	$	1,827		$	417
Write-downs included in gain (loss) on sale of other real estate owned		(304	)		(101	)
Fair value	$	1,523		$	316

Schedule of Estimated Fair Values and Carrying Values of All Financial Instruments Under Current Authoritative Guidance

The estimated fair values and carrying values of all financial instruments under current authoritative guidance at March 31, 2013 and December 31, 2012, were as follows (in thousands):

	March 31,				December 31,
	2013				2012
	Carrying		Estimated		Carrying		Estimated		Fair Value
	Value		Fair Value		Value		Fair Value		Hierarchy
Cash and due from banks	$	113,958	$	113,958	$	207,018	$	207,018	Level 1
Federal funds sold		3,175		3,175		14,045		14,045	Level 1
Interest-bearing deposits in banks		20,065		20,065		139,676		139,676	Level 1
Interest-bearing time deposits in banks		45,172		45,415		49,005		49,288	Level 2
Available-for-sale securities		1,958,151		1,958,151		1,819,035		1,819,035	Levels 1 and 2
Held-to-maturity securities		903		920		1,061		1,080	Level 2
Loans		2,103,465		2,120,669		2,053,784		2,081,091	Level 3
Accrued interest receivable		20,904		20,904		23,122		23,122	Level 2
Deposits with stated maturities		620,848		621,946		637,040		638,227	Level 2
Deposits with no stated maturities		2,929,278		2,929,278		2,995,544		2,995,544	Level 1
Short term borrowings		263,345		263,345		259,697		259,697	Level 2
Accrued interest payable		239		239		287		287	Level 2