Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities
Net income	$ 44,116	$ 30,634
Adjustments to reconcile net income to net cash used in operating activities, net of effects from acquisitions:
Provision for loan losses	3,230	2,250
Depreciation, amortization and accretion	88	2,687
Deferred income tax expense	3,845	5,918
Funding of mortgage loans held for sale	(1,006,507)	(407,893)
Proceeds from sales of mortgage loans held for sale	968,800	335,538
Gains on sales of mortgage loans held for sale	(12,971)	(10,040)
Gains on sales of securities	(1,186)	(96)
Penalty on extinguishment of debt	329	0
Losses on sales of premises and equipment	102	19
Stock-based compensation	1,715	1,720
Decrease in FDIC loss-share indemnification asset, net of accretion	1,049	3,623
(Increase) decrease in other assets	(5,392)	12,084
Decrease in other liabilities	(3,464)	(8,887)
Net cash used in operating activities	(6,246)	(32,443)
Investing activities
Purchases of securities available for sale	(34,651)	(29,066)
Proceeds from sales of securities available for sale	4,028	1,213
Proceeds from call/maturities of securities available for sale	72,069	51,461
Purchases of securities held to maturity	(9,073)	(119,766)
Proceeds from call/maturities of securities held to maturity	81,510	109,817
Net increase in loans	(272,514)	(48,164)
Purchases of premises and equipment	(5,651)	(11,194)
Proceeds from sales of premises and equipment	1,198	0
Proceeds from sales of other assets	7,957	0
Net cash received in acquisition	25,263	0
Net cash used in investing activities	(129,864)	(45,699)
Financing activities
Net increase in noninterest-bearing deposits	107,969	52,800
Net increase (decrease) in interest-bearing deposits	25,791	(774)
Net increase in short-term borrowings	20,361	31,826
Proceeds from long-term borrowings	277	0
Repayment of long-term debt	(5,436)	(1,836)
Cash paid for dividends	(14,498)	(10,800)
Cash received on exercise of stock options	401	73
Excess tax benefit from stock-based compensation	482	232
Net cash provided by financing activities	135,347	71,521
Net decrease in cash and cash equivalents	(763)	(6,621)
Cash and cash equivalents at beginning of period	211,571	161,583
Cash and cash equivalents at end of period	210,808	154,962
Supplemental disclosures
Cash paid for interest	12,624	10,586
Cash paid for income taxes	16,411	5,994
Noncash transactions:
Transfers of loans to other real estate owned	3,508	6,930
Financed sales of other real estate owned	150	637
Transfers of loans held for sale to loan portfolio	14,375	0
Common stock issued in merger and acquisition transaction	$ 55,290	$ 0