Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Assets
Cash and due from banks	$ 139,538	$ 114,587
Interest-bearing deposits in other banks	362,153	266,615
Trading securities, at fair value	18,351	16,894
Securities available-for-sale, at fair value	1,964,030	1,306,636
Securities held-to-maturity, at amortized cost	20,337	23,152
Federal Home Loan Bank (FHLB) and Federal Reserve Bank (FRB) stock, at cost	53,506	39,306
Loans	8,171,782	7,161,715
Allowance for loan losses	(85,308)	(73,630)
Net loans	8,086,474	7,088,085
Other real estate owned (OREO)	28,049	27,782
Premises, furniture, and equipment, net	82,443	122,278
Investment in bank-owned life insurance (BOLI)	219,064	209,601
Goodwill and other intangible assets	367,961	339,277
Accrued interest receivable and other assets	236,291	178,463
Total assets	11,578,197	9,732,676
Liabilities
Noninterest-bearing deposits	2,766,265	2,414,454
Interest-bearing deposits	6,339,839	5,683,284
Total deposits	9,106,104	8,097,738
Borrowed funds	639,539	165,096
Senior and subordinated debt	309,444	201,208
Accrued interest payable and other liabilities	253,846	122,366
Total liabilities	10,308,933	8,586,408
Stockholders' Equity
Common stock	913	882
Additional paid-in capital	496,918	446,672
Retained earnings	1,003,271	953,516
Accumulated other comprehensive loss, net of tax	(13,402)	(28,389)
Treasury stock, at cost	(218,436)	(226,413)
Total stockholders' equity	1,269,264	1,146,268
Total liabilities and stockholders' equity	$ 11,578,197	$ 9,732,676
Stockholders' Equity, Number of Shares, Par Value, and Other Disclosures
Par Value, common stock (in Dollars per share)	$ 0.01	$ 0.01
Shares authorized, preferred stock (in Shares)	1,000,000	1,000,000
Shares authorized, common stock (in Shares)	150,000,000	150,000,000
Shares issued, common stock (in Shares)	91,281,000	88,228,000
Shares outstanding, common stock (in Shares)	81,324,000	77,952,000
Treasury shares, common stock (in Shares)	9,957,000	10,276,000