CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
OPERATING ACTIVITIES:
Net income	$ 20,017	$ 17,735
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization on investment securities, net	138	135
Accretion on loans deposits and core deposit intangible net	(583)	(873)
Depreciation of premises and equipment	2,100	1,716
Amortization of mortgaging servicing rights	353	305
Provision for loan and lease losses	12,351	5,186
Net gain on sale of mortgage loans held for sale	(977)	(1,095)
Origination of mortgage loans held for sale	(33,245)	(36,992)
Proceeds from sale of mortgage loans held for sale	40,691	35,022
Net gain on sale of consumer loans held for sale	(1,108)	(433)
Origination of consumer loans held for sale	(126,924)	(44,068)
Proceeds from sale of consumer loans held for sale	126,441	44,034
Net gain realized on sale of other real estate owned	(212)	(248)
Writedowns of other real estate owned	70
Deferred director compensation expense - Class A Common Stock	55	62
Stock based compensation expense	410	261
Increase in cash surrender value of bank owned life insurance	(391)	(339)
Net change in other assets and liabilities:
Accrued interest receivable	209	(180)
Accrued interest payable	(90)	54
Other assets	(2,096)	(2,390)
Other liabilities	8,700	7,878
Net cash provided by operating activities	45,909	25,770
INVESTING ACTIVITIES:
Purchases of securities available for sale	(54,390)	(370,084)
Proceeds from calls, maturities and paydowns of securities available for sale	10,017	370,390
Proceeds from calls, maturities and paydowns of securities held to maturity	1,002	882
Net change in outstanding warehouse lines of credit	90,274	(7,257)
Purchase of non-business acquisition loans, including premiums paid	(1,224)	(23,188)
Net change in other loans	8,800	4,274
Proceeds from sales of other real estate owned	501	588
Net purchases of premises and equipment	(3,193)	(887)
Net cash provided by (used in) investing activities	51,787	(25,282)
FINANCING ACTIVITIES:
Net change in deposits	188,092	249,169
Net change in securities sold under agreements to repurchase and other short-term borrowings	(29,098)	(75,540)
Payments of Federal Home Loan Bank advances	(435,000)	(182,000)
Proceeds from Federal Home Loan Bank advances	100,000
Repurchase of Class A Common Stock	(544)
Net proceeds from Common Stock options exercised	33	55
Cash dividends paid	(4,301)	(4,082)
Net cash used in financing activities	(180,818)	(12,398)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(83,122)	(11,910)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	289,309	210,082
CASH AND CASH EQUIVALENTS AT END OF YEAR	206,187	198,172
Cash paid during the period for:
Interest	4,535	4,527
Income taxes	331	156
SUPPLEMENTAL NONCASH DISCLOSURES:
Transfers from loans to real estate acquired in settlement of loans	$ 330	656
Loans provided for sales of other real estate owned		$ 256