Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 17,201	$ 19,687
Adjustments to reconcile net income to net cash used in operating activities
Provision for loan and lease losses	2,583	321
Reversal for loan repurchases	(325)	(359)
Net revenue on mortgage banking activities	(29,434)	(33,684)
Net gain on sale of loans	(4,019)	(2,195)
Net amortization of premiums and discounts on securities	218	389
Depreciation on premises and equipment	3,324	2,830
Amortization of intangibles	1,090	1,322
Amortization of debt issuance cost	42	245
Stock option compensation expense	247	138
Stock award compensation expense	2,604	3,653
Stock appreciation right compensation expense	42	13
Bank owned life insurance income	(581)	(563)
Impairment on intangible assets	336	0
Net gain on sale of securities available-for-sale	(3,356)	(16,789)
Net gain on disposal of discontinued operations	(13,302)	0
Gain on sale of mortgage servicing rights	0	(2)
Loss (gain) on sale of other real estate owned	5	(37)
Loss on investments in alternative energy partnerships, net	8,682	0
Deferred income tax expense	(8,214)	(98)
Loss on sale or disposal of property and equipment	255	1
Loss from change of fair value and runoff on mortgage servicing rights	1,903	10,151
Increase in valuation allowances on other real estate owned	3	0
Repurchase of mortgage loans	(13,630)	(8,035)
Originations of loans held-for-sale from mortgage banking	(935,428)	(1,024,307)
Originations of other loans held-for-sale	(63,101)	(201,195)
Proceeds from sales of and principal collected on loans held-for-sale from mortgage banking	958,529	1,009,532
Proceeds from sales of and principal collected on other loans held-for-sale	127,629	67,846
Change in deferred loan fees	(708)	(85)
Net amortization of premiums and discounts on purchased loans	(2,070)	(10,617)
Change in accrued interest receivable	1,331	(4,167)
Change in other assets	(13,875)	(22,349)
Change in accrued interest payable and other liabilities	(53,972)	13,038
Net cash used in operating activities	(15,991)	(195,316)
Cash flows from investing activities:
Proceeds from sales of securities available-for-sale	378,539	2,247,421
Proceeds from maturities and calls of securities available-for-sale	32,465	0
Proceeds from principal repayments of securities available-for-sale	10,746	19,326
Proceeds from maturities and calls of securities held-to-maturity	21,020	0
Purchases of securities available-for-sale	(472,850)	(2,975,271)
Net cash provided by disposal of discontinued operations	55,629	0
Loan and lease originations and principal collections, net	(309,961)	(293,744)
Purchase of loans and leases	0	(31,048)
Redemption of Federal Home Loan Bank stock	4,813	5,690
Purchase of Federal Home Loan Bank and other bank stock	(209)	(7,767)
Proceeds from sale of loans	249,695	51,826
Proceeds from sale of other real estate owned	320	956
Proceeds from sale of mortgage servicing rights	0	5
Proceeds from sale of premises and equipment	172	0
Additions to premises and equipment	(10,317)	(6,202)
Payments of capital lease obligations	(271)	(243)
Investments in alternative energy partnerships	(30,927)	0
Net cash used in investing activities	(71,136)	(989,051)
Cash flows from financing activities:
Net (decrease) increase in deposits	(544,457)	534,516
Net increase in short-term Federal Home Loan Bank advances	540,000	265,000
Repayment of long-term Federal Home Loan Bank advances	(50,000)	0
Proceeds from long-term Federal Home Loan Bank advances	100,000	0
Net increase in securities sold under repurchase agreements	26,320	257,100
Net proceeds from issuance of common stock	0	75,531
Net proceeds from issuance of preferred stock	0	120,258
Payment of amortizing debt	(1,330)	(1,234)
Restricted stock surrendered due to employee tax liability	(2,135)	(193)
Dividend equivalents paid on stock appreciation rights	(202)	(184)
Dividends paid on preferred stock	(5,113)	(3,030)
Dividends paid on common stock	(6,185)	(4,509)
Net cash provided by financing activities	56,898	1,243,255
Net change in cash and cash equivalents	(30,229)	58,888
Cash and cash equivalents at beginning of period	439,510	156,124
Cash and cash equivalents at end of period	409,281	215,012
Supplemental cash flow information
Interest paid on deposits and borrowed funds	15,888	16,306
Income taxes paid	6,574	1,597
Income taxes refunds received	0	1
Supplemental disclosure of non-cash activities
Transfer from loans to other real estate owned, net	1,171	147
Transfer of loans held-for-investment to loans held-for-sale, net of transfer of $0 from allowance for loan and lease losses for the three months ended March 31, 2017 and 2016	242,288	61,410
Transfer of loans held-for-sale to loans held-for-investment	0	4,746
Equipment acquired under capital leases	$ 70	$ 0