Fair Value of Assets and Liabilities (Tables)

9 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Fair value measurement of assets and liabilities measured at fair value on a recurring basis

			Fair Value Measurements At the End of the Reporting Period Using
(Dollars in thousands)	Fair Value September 30, 2013		Quoted Prices in Active  Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Investment securities, available-for-sale
U.S. government sponsored enterprises	$	11,556	—	11,556	—
State and local governments	1,341,384		—	1,341,384	—
Corporate bonds	442,845		—	442,845	—
Residential mortgage-backed securities	1,523,168		—	1,523,168	—
Total assets measured at fair value on a recurring basis	$	3,318,953	—	3,318,953	—
Interest rate swaps	$	2,004	—	2,004	—
Total liabilities measured at fair value on a recurring basis	$	2,004	—	2,004	—

			Fair Value Measurements At the End of the Reporting Period Using
(Dollars in thousands)	Fair Value December 31, 2012		Quoted Prices in Active  Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Investment securities, available-for-sale
U.S. government and federal agency	$	202	—	202	—
U.S. government sponsored enterprises	17,480		—	17,480	—
State and local governments	1,214,518		—	1,214,518	—
Corporate bonds	288,795		—	288,795	—
Collateralized debt obligations	1,708		—	1,708	—
Residential mortgage-backed securities	2,160,302		—	2,160,302	—
Total assets measured at fair value on a recurring basis	$	3,683,005	—	3,683,005	—
Interest rate swaps	$	16,832	—	16,832	—
Total liabilities measured at fair value on a recurring basis	$	16,832	—	16,832	—

Fair value measurement of assets measured at fair value on a non-recurring basis

			Fair Value Measurements At the End of the Reporting Period Using
(Dollars in thousands)	Fair Value September 30, 2013		Quoted Prices in Active  Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Other real estate owned	$	7,646	—	—	7,646
Collateral-dependent impaired loans, net of ALLL	19,066		—	—	19,066
Total assets measured at fair value on a non-recurring basis	$	26,712	—	—	26,712

			Fair Value Measurements At the End of the Reporting Period Using
(Dollars in thousands)	Fair Value December 31, 2012		Quoted Prices in Active  Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Other real estate owned	$	13,983	—	—	13,983
Collateral-dependent impaired loans, net of ALLL	22,966		—	—	22,966
Total assets measured at fair value on a non-recurring basis	$	36,949	—	—	36,949

Quantitative information about assets measured at fair value on a non-recurring basis for which Level 3 inputs were used

	Fair Value		Quantitative Information about Level 3 Fair Value Measurements
(Dollars in thousands)	September 30, 2013		Valuation Technique	Unobservable Input	Range (Weighted Average) 1
Other real estate owned	$	6,828	Sales comparison approach	Selling costs	1.0% - 11.0% (7.0%)
				Adjustment to comparables	0.0% - 10.0% (0.0%)
	818		Combined approach	Selling costs	5.0% - 5.0% (5.0%)
				Adjustment to comparables	25.0% - 25.0% (25.0%)
	$	7,646
Collateral-dependent impaired loans, net of ALLL	$	442	Cost approach	Selling costs	10.0% - 50.0% (19.2%)
	2,553		Income approach	Selling costs	8.0% - 8.0% (8.0%)
				Discount rate	8.3% - 8.3% (8.3%)
	13,700		Sales comparison approach	Selling costs	0.0% - 10.0% (8.0%)
				Discount rate	0.0% - 0.0% (0.0%)
				Adjustment to comparables	0.0% - 1.0% (0.0%)
	2,371		Combined approach	Selling costs	8.0% - 8.0% (8.0%)
				Adjustment to comparables	10.0% - 36.0% (22.5%)
	$	19,066

__________

¹ The range for selling costs and adjustments to comparables indicate reductions to the fair value.

Carrying amounts and estimated fair values of financial instruments

			Fair Value Measurements At the End of the Reporting Period Using
(Dollars in thousands)	Carrying Amount September 30, 2013		Quoted Prices in Active  Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Financial assets
Cash and cash equivalents	$	254,684	254,684	—	—
Investment securities, available-for-sale	3,318,953		—	3,318,953	—
Loans held for sale	61,505		61,505	—	—
Loans receivable, net of ALLL	3,870,334		—	3,758,724	194,190
Accrued interest receivable	44,261		44,261	—	—
Non-marketable equity securities	52,192		—	52,192	—
Total financial assets	$	7,601,929	360,450	7,129,869	194,190
Financial liabilities
Deposits	$	5,612,880	4,153,782	1,486,996	—
FHLB advances	967,382		—	986,292	—
Repurchase agreements and other borrowed funds	322,779		—	322,779	—
Subordinated debentures	125,526		—	72,554	—
Accrued interest payable	3,568		3,568	—	—
Interest rate swaps	2,004		—	2,004	—
Total financial liabilities	$	7,034,139	4,157,350	2,870,625	—

			Fair Value Measurements At the End of the Reporting Period Using
(Dollars in thousands)	Carrying Amount December 31, 2012		Quoted Prices in Active  Markets for Identical Assets (Level 1)	Significant Other Observable Inputs (Level 2)	Significant Unobservable Inputs (Level 3)
Financial assets
Cash and cash equivalents	$	187,040	187,040	—	—
Investment securities, available-for-sale	3,683,005		—	3,683,005	—
Loans held for sale	145,501		145,501	—	—
Loans receivable, net of ALLL	3,266,571		—	3,184,987	186,201
Accrued interest receivable	37,770		37,770	—	—
Non-marketable equity securities	48,812		—	48,812	—
Total financial assets	$	7,368,699	370,311	6,916,804	186,201
Financial liabilities
Deposits	$	5,364,461	3,585,126	1,789,134	—
FHLB advances	997,013		—	1,027,101	—
Repurchase agreements and other borrowed funds	299,540		—	299,540	—
Subordinated debentures	125,418		—	70,895	—
Accrued interest payable	4,675		4,675	—	—
Interest rate swaps	16,832		—	16,832	—
Total financial liabilities	$	6,807,939	3,589,801	3,203,502	—