CONSOLIDATED BALANCE SHEETS - UNAUDITED (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Cash and due from banks:
Non-interest bearing	$ 46,593	$ 45,976
Interest bearing	18,763	14,590
Interest bearing deposits at Federal Reserve Bank	280,042	190,075
Federal funds sold	2,746	2,108
Cash and cash equivalents	348,144	252,749
Investment securities available for sale, at fair value (including covered securities of $205,769 at December 31, 2013)	4,304,329	3,637,124
Non-marketable equity securities	159,049	152,066
Loans held for sale	2,119	194
Loans (including covered loans of $1,099,927 and $1,483,888)	11,085,776	9,053,609
Allowance for loan and lease losses	(78,868)	(69,725)
Loans, net	11,006,908	8,983,884
FDIC indemnification asset	1,023,079	1,205,117
Bank owned life insurance	214,320	206,759
Equipment under operating lease	242,448	196,483
Other real estate owned (including covered OREO of $18,216 and $39,672)	18,531	40,570
Deferred tax asset, net	98,113	70,626
Goodwill and other intangible assets	68,575	69,067
Other assets	195,124	232,010
Total assets	17,680,739	15,046,649
Demand deposits:
Non-interest bearing	2,579,163	2,171,335
Interest bearing	857,910	676,079
Savings and money market	5,411,565	4,402,987
Time	3,985,269	3,282,027
Total deposits	12,833,907	10,532,428
Federal Home Loan Bank advances and other borrowings	2,593,648	2,414,313
Other liabilities	213,015	171,210
Total liabilities	15,640,570	13,117,951
Commitments and contingencies
Stockholders' equity:
Common stock, par value $0.01 per share, 400,000,000 shares authorized; 101,665,975 and 101,013,014 shares issued and outstanding	1,017	1,010
Paid-in capital	1,348,964	1,334,945
Retained earnings	626,761	535,263
Accumulated other comprehensive income	63,427	57,480
Total stockholders' equity	2,040,169	1,928,698
Total liabilities and stockholders' equity	$ 17,680,739	$ 15,046,649