Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and due from banks	$ 95,030	$ 88,776
Interest-earning balances due from Federal Reserve	10,738	5,917
Total cash and cash equivalents	105,768	94,693
Interest-earning balances due from depository institutions	27,118	70,000
Investment securities available-for-sale, at fair value (with amortized cost of $3,083,582 at December 31, 2014, and $2,679,727 at December 31, 2013)	3,137,158	2,663,642
Investment securities held-to-maturity	1,528	1,777
Investment in stock of Federal Home Loan Bank (FHLB)	25,338	32,331
Loans held-for-sale	0	3,667
Loans and lease finance receivables	3,817,067	3,546,231
Allowance for loan losses	(59,825)	(75,235)
Net loans and lease finance receivables	3,757,242	3,470,996
Premises and equipment, net	33,591	32,831
Bank owned life insurance	126,927	123,168
Accrued interest receivable	23,194	22,051
Intangibles	3,214	2,261
Goodwill	74,244	55,097
FDIC loss sharing asset	299	4,764
Other real estate owned	5,637	6,979
Income taxes	31,461	59,786
Other assets	25,201	20,924
Total assets	7,377,920	6,664,967
Deposits:
Noninterest-bearing	2,866,365	2,562,980
Interest-bearing	2,738,293	2,327,651
Total deposits	5,604,658	4,890,631
Customer repurchase agreements	563,627	643,251
FHLB advances	199,479	199,206
Other borrowings	46,000	69,000
Accrued interest payable	1,161	1,111
Deferred compensation	10,291	9,449
Junior subordinated debentures	25,774	25,774
Payable for securities purchased	0	3,533
Other liabilities	48,821	51,125
TOTAL LIABILITIES	6,499,811	5,893,080
COMMITMENTS AND CONTINGENCIES
Stockholders' Equity:
Common stock, authorized, 225,000,000 shares without par; issued and outstanding 105,893,216 at December 31, 2014, and 105,370,170 at December 31, 2013.	495,220	491,068
Retained earnings	351,814	290,149
Accumulated other comprehensive income, net of tax	31,075	(9,330)
Total stockholders' equity	878,109	771,887
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 7,377,920	$ 6,664,967