Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income attributable to the Company	$ 39,068	$ 34,439
Adjustments to arrive at net income from continuing operations [Abstract]
Net income attributable to noncontrolling interests	2,116	1,900
Less: Net income from discontinued operations	(2,695)	(3,310)
Net income from continuing operations	38,489	33,029
Adjustments to reconcile net income from continuing operations to net cash provided by/(used in) operating activities:
Depreciation and amortization	10,575	10,927
Net income attributable to noncontrolling interests	2,116	1,900
Stock compensation, net of cancellations	4,137	372
Provision/ (credit) for loan losses	(6,295)	(5,668)
Loans originated for sale	(19,814)	(39,923)
Proceeds from sale of loans held for sale	20,605	43,724
Deferred income tax expense/ (benefit)	1,240	4,624
Net decrease/ (increase) in other operating activities	(6,434)	(3,472)
Net cash provided by/ (used in) operating activities of continuing operations	40,387	41,713
Net cash provided by/ (used in) operating activities of discontinued operations	2,695	3,310
Net cash provided by/ (used in) operating activities	43,082	45,023
Investment securities available for sale:
Purchases	(99,647)	(196,651)
Sales	103,031	29,132
Maturities, calls, redemptions, and principal payments	78,610	82,420
Purchases	14,945	0
Principal payments	8,745	10,698
(Investments)/ distributions in trusts, net	(514)	(392)
Purchase of additional Bank Owned Life Insurance (BOLI)	(50,000)	0
(Purchase)/ redemption of Federal Home Loan Banks stock	(1,491)	(9,193)
Net (increase)/ decrease in portfolio loans	(165,426)	(37,832)
Proceeds from recoveries of loans previously charged-off	3,748	5,956
Proceeds from sale of OREO	1,644	958
Capital expenditures, net of sale proceeds	(6,298)	(5,053)
Net cash provided by/ (used in) investing activities of continuing operations	(142,543)	(119,957)
Net cash provided by/ (used in) investing activities	(142,543)	(119,957)
Cash flows from financing activities:
Net increase/ (decrease) in deposits	296,193	(393,787)
Net increase/ (decrease) in securities sold under agreements to repurchase	(30,392)	(14,911)
Net increase/ (decrease) in federal funds purchased	(40,000)	180,000
Net increase/ (decrease) in short-term Federal Home Loan Bank borrowings	(90,000)	235,000
Advances of long-term Federal Home Loan Bank borrowings	46,235	47,434
Repayments of long-term Federal Home Loan Bank borrowings	(71,451)	(65,746)
Dividends paid to common shareholders	(18,452)	(16,602)
Dividends paid to preferred shareholders	(1,738)	(1,738)
Proceeds from warrant exercises	1,877	0
Repurchase of common stock	0	(4,495)
Tax benefit/ (deficiency) from certain stock compensation awards	0	(749)
Proceeds from stock option exercises	804	529
Proceeds from issuance of common stock, net	(248)	0
Distributions paid to noncontrolling interests	(2,064)	(1,844)
Other equity adjustments	(828)	(684)
Net cash provided by/ (used in) financing activities of continuing operations	89,936	(37,593)
Net cash provided by/ (used in) financing activities	89,936	(37,593)
Net increase/ (decrease) in cash and cash equivalents	(9,525)	(112,527)
Cash and cash equivalents at beginning of year	106,557	238,694
Cash and cash equivalents at end of period	97,032	126,167
Supplementary schedule of non-cash investing and financing activities:
Cash paid for interest	15,591	13,646
Cash paid for income taxes, net of (refunds received)	16,600	20,834
Change in unrealized gain/ (loss) on available-for-sale securities, net of tax	6,322	15,140
Change in unrealized gain/ (loss) on cash flow hedges, net of tax	176	(986)
Change in unrealized gain/ (loss) on other, net of tax	12	0
Loans transferred into other real estate owned from loan portfolio	0	1,944
Loans charged-off	(521)	(3,035)
Premises and equipment transferred into/ (out of) other assets held for sale	0	891
Deposits transferred into/(out of) held for sale	$ 0	$ 110,558