Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities
Net income	$ 46,854	$ 43,985
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	3,000	5,117
Depreciation, amortization and accretion	5,053	5,658
Deferred income tax expense	3,794	12,237
Funding of mortgage loans held for sale	(992,555)	(408,863)
Proceeds from sales of mortgage loans held for sale	1,069,625	418,090
Gains on sales of mortgage loans held for sale	(20,618)	(6,226)
Gains on sales of securities	(96)	(375)
Losses (gains) on sales of premises and equipment	37	(58)
Stock-based compensation	2,739	3,162
Decrease in FDIC loss-share indemnification asset, net of accretion	5,202	10,227
Decrease in other assets	17,182	16,429
Decrease in other liabilities	(11,047)	(9,526)
Net cash provided by operating activities	129,170	89,857
Investing activities
Purchases of securities available for sale	(54,256)	(100,129)
Proceeds from sales of securities available for sale	8,444	1,099
Proceeds from call/maturities of securities available for sale	83,488	60,202
Purchases of securities held to maturity	(137,776)	(154,126)
Proceeds from call/maturities of securities held to maturity	121,438	130,206
Net increase in loans	(177,740)	(82,319)
Purchases of premises and equipment	(19,364)	(12,494)
Proceeds from sales of premises and equipment	448	0
Net cash received in acquisition	35,787	0
Net cash used in investing activities	(139,531)	(157,561)
Financing activities
Net increase in noninterest-bearing deposits	107,728	79,524
Net decrease in interest-bearing deposits	(85,693)	(157,766)
Net increase in short-term borrowings	355,063	63,363
Proceeds from long-term borrowings	42	0
Repayment of long-term debt	(307,230)	(7,864)
Cash paid for dividends	(17,681)	(16,135)
Cash received on exercise of stock-based compensation	102	401
Excess tax benefit from stock-based compensation	296	1,127
Net cash provided by (used in) financing activities	52,627	(37,350)
Net increase (decrease) in cash and cash equivalents	42,266	(105,054)
Cash and cash equivalents at beginning of period	161,583	246,648
Cash and cash equivalents at end of period	203,849	141,594
Supplemental disclosures
Cash paid for interest	15,936	18,674
Cash paid for income taxes	10,768	9,300
Noncash transactions:
Transfers of loans to other real estate owned	12,268	8,318
Financed sales of other real estate owned	$ 1,017	$ 860