Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets:
Cash and due from banks	$ 63,640	$ 60,787
Interest-earning deposits in other banks	85,385	55,134
Investment securities:
Available for sale debt securities, at fair value	2,180,570	2,030,696
Preferred stock and other equity securities, at fair value	88,476	90,107
Federal Home Loan Bank and other bank stock, at cost	58,184	56,881
Total investment securities	2,327,230	2,177,684
Loans held for sale	4,167	12,736
Loans:
Loans	8,704,392	7,977,784
Allowance for loan losses	(49,213)	(47,145)
Loans, net	8,655,179	7,930,639
Premises and equipment, net	39,424	36,144
Other real estate owned	14,072	14,906
Goodwill	139,784	81,204
Core deposit intangible	7,954	3,668
Deferred tax assets, net	34,933	27,043
Bank-owned life insurance	212,925	201,069
Other assets	77,420	76,065
Total assets	11,662,113	10,677,079
Transaction accounts:
Noninterest-bearing	1,478,837	1,236,685
Interest-bearing	4,770,265	4,830,525
Total transaction accounts	6,249,102	6,067,210
Time deposits	3,237,174	2,606,717
Total deposits	9,486,276	8,673,927
Borrowings (including FHLB advances of $657,000 and $670,000, respectively)	753,921	749,113
Other liabilities	117,774	74,867
Total liabilities	10,357,971	9,497,907
Commitments and contingencies (Note 13)
Stockholders’ Equity:
Additional paid-in capital	1,034,687	933,960
Retained earnings	353,019	313,645
Accumulated other comprehensive income (loss)	(6,240)	8,893
Treasury stock, at cost; 2,727,865; 2,694,489 Class A and 192,132; 192,132 Class B common shares	(77,373)	(77,373)
Total stockholders’ equity	1,304,142	1,179,172
Total liabilities and stockholders’ equity	11,662,113	10,677,079
Class A Common Stock
Stockholders’ Equity:
Common stock	49	47
Class B Non-voting Common Stock
Stockholders’ Equity:
Common stock	0	0
New loans
Loans:
Loans	7,976,251	7,661,385
Allowance for loan losses	(44,690)
Acquired loans
Loans:
Loans	728,141	$ 316,399
Allowance for loan losses	$ (1,113)