CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Acquisition-related costs	$ 676	$ 1,005	$ 3,125	$ 1,005
INTEREST INCOME:
Loans receivable	118,096	104,868	350,558	298,743
Mortgage-backed securities	9,415	8,915	29,716	25,145
Securities and cash equivalents	3,925	3,865	11,996	11,003
Total interest income	131,436	117,648	392,270	334,891
INTEREST EXPENSE:
Deposits	10,014	5,517	27,680	13,139
FHLB advances	3,107	1,388	9,953	3,564
Other borrowings	82	60	209	179
Junior subordinated debentures	1,612	1,605	5,008	4,495
Total interest expense	14,815	8,570	42,850	21,377
Net interest income	116,621	109,078	349,420	313,514
PROVISION FOR LOAN LOSSES	2,000	2,000	6,000	6,000
Net interest income after provision for loan losses	114,621	107,078	343,420	307,514
NON-INTEREST INCOME:
Deposit fees and other service charges	10,331	12,255	36,995	35,535
Bank-owned life insurance (BOLI)	1,076	1,726	3,475	3,511
Miscellaneous	2,914	569	5,431	4,995
Other operating income	20,937	20,366	61,868	59,365
Net (loss) gain on sale of securities	(2)	0	(29)	48
Net change in valuation of financial instruments carried at fair value	(69)	45	(172)	3,577
Total non-interest income	20,866	20,411	61,667	62,990
NON-INTEREST EXPENSE:
Salary and employee benefits	59,090	48,930	169,359	150,491
Less capitalized loan origination costs	(7,889)	(4,318)	(20,137)	(13,062)
Occupancy and equipment	12,566	12,385	39,013	35,725
Information/computer data services	5,657	4,766	16,256	13,711
Payment and card processing expenses	4,330	3,748	12,355	11,179
Professional and legal expenses	2,704	3,010	7,474	11,276
Advertising and marketing	2,221	1,786	5,815	5,758
Deposit insurance (benefit) expense	(1,604)	991	1,232	3,353
State/municipal business and use taxes	1,011	902	2,963	2,430
REO operations, net	126	433	263	553
Amortization of core deposit intangibles	1,985	1,348	6,090	4,112
Miscellaneous	6,435	6,646	20,230	19,444
Total non-interest expense	87,308	81,632	264,038	245,975
Noninterest Operating Expense, Before Acquisition Related Costs	86,632	80,627	260,913	244,970
Income before provision for income taxes	48,179	45,857	141,049	124,529
PROVISION FOR INCOME TAXES	8,602	8,084	28,426	25,542
NET INCOME	$ 39,577	$ 37,773	$ 112,623	$ 98,987
Earnings per common share:
Basic	$ 1.15	$ 1.17	$ 3.24	$ 3.06
Diluted	1.15	1.17	3.23	3.05
Cumulative dividends declared per common share	$ 0.41	$ 0.38	$ 1.23	$ 1.58
Weighted average number of common shares outstanding, Basic	34,407,462	32,256,789	34,760,607	32,300,688
Weighted average number of common shares outstanding, Diluted	34,497,994	32,376,623	34,850,006	32,406,414
Mortgage Banking [Member]
NON-INTEREST INCOME:
Mortgage banking operations	$ 6,616	$ 5,816	$ 15,967	$ 15,324