Consolidated Statement of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income attributable to the Company	$ 64,925	$ 68,815	$ 70,535
Adjustments to arrive at net income/(loss) from continuing operations
Net income attributable to noncontrolling interests	(4,407)	(4,750)	(3,948)
Net pre-tax gain from operating activities of discontinued operations	11,234	11,258	13,913
Tax expense from discontinued operations	4,823	5,098	6,121
Net income from continuing operations	62,921	67,405	66,691
Adjustments to reconcile net income/(loss) from continuing operations to net cash provided by/(used in) operating activities:
Depreciation and amortization	22,187	19,378	19,107
Net income attributable to noncontrolling interests	(4,407)	(4,750)	(3,948)
Equity issued as compensation	9,820	6,239	6,747
Provision/ (credit) for loan losses	(1,555)	(6,400)	(10,000)
Loans originated for sale	(153,445)	(71,858)	(231,539)
Proceeds from sale of loans held for sale	153,679	71,440	254,345
Gain on repurchase of debt	0	0	(620)
Gain on sale of Pacific Northwest offices	0	0	(10,574)
Deferred income tax expense/(benefit)	(4,575)	5,058	10,313
Net decrease/(increase) in other operating activities	2,852	14,387	5,861
Net cash provided by/(used in) operating activities of continuing operations	87,477	100,899	106,383
Net cash provided by/(used in) operating activities of discontinued operations	6,411	6,160	7,792
Net cash provided by/(used in) operating activities	93,888	107,059	114,175
Investment securities available for sale:
Payments to Acquire Available-for-sale Securities	506,529	335,404	243,359
Proceeds from Sale of Available-for-sale Securities	34,160	6,450	4,062
Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities	208,467	190,926	227,973
Investment securities held to maturity:
Payments to Acquire Held-to-maturity Securities	0	(48,835)	(112,391)
Proceeds from Maturities, Prepayments and Calls of Held-to-maturity Securities	23,741	19,263	325
(Investments)/distributions in trusts, net	(165)	(385)	154
(Purchase)/ redemption of Federal Home Loan Banks stock	(2,900)	6,331	3,369
Net increase in portfolio loans	(452,675)	(221,256)	(310,834)
Proceeds from recoveries of loans previously charged off	6,253	11,163	7,731
Proceeds from sale of OREO	277	1,102	2,455
Proceeds from sale of portfolio loans	0	58,568	9,449
Proceeds from sale of Pacific Northwest offices	0	0	123,693
Capital expenditures, net of sale proceeds	(5,419)	(9,705)	(8,311)
Cash received from dispositions/ (paid for acquisitions, including deferred acquisition obligations, net of cash acquired)	0	(44,845)	0
Payments for (Proceeds from) Other Investing Activities	0	(1,601)	(224)
Net cash provided by/(used in) investing activities - continuing operations	(694,790)	(368,228)	(295,908)
Net cash provided by/(used in) investing activities - discontinued operations	0	0	0
Net cash provided by/(used in) investing activities	(694,790)	(368,228)	(295,908)
Cash flows from financing activities:
Net increase in deposits	586,558	343,509	199,381
Net (decrease)/increase in securities sold under agreements to repurchase and other	27,719	(71,857)	(13,966)
Net (decrease)/increase in short-term Federal Home Loan Bank borrowings	40,000	10,000	(40,000)
Advances of long-term Federal Home Loan Bank borrowings	123,636	55,000	120,000
Repayments of long-term Federal Home Loan Bank borrowings	(72,462)	(62,104)	(120,867)
Repurchase of debt	0	0	(35,536)
Proceeds from issuance of Series D preferred stock, net	0	0	47,753
Repurchase of Series B preferred stock, including deemed dividend at repurchase	0	0	(69,827)
Dividends paid to common share holders	(29,608)	(25,829)	(19,129)
Dividends paid to preferred shareholders	(3,475)	(3,475)	(2,660)
Tax savings/ (deficiency) from certain stock compensation awards	(1,262)	1,294	(663)
Proceeds from stock option exercises	1,206	1,807	2,332
Proceeds from issuance of common stock, net	(515)	(353)	1,230
Distributions paid to noncontrolling interests	(4,611)	(4,426)	(3,416)
Other equity adjustments	(199)	(1,669)	238
Net cash provided by/(used in) financing activities - continuing operations	666,987	241,897	64,870
Net cash provided by/(used in) financing activities - discontinued operations	0	0	0
Net cash provided by/(used in) financing activities	666,987	241,897	64,870
Net increase/(decrease) in cash and cash equivalents	66,085	(19,272)	(116,863)
Cash and cash equivalents at beginning of year	172,609	191,881	308,744
Cash and cash equivalents at end of period	238,694	172,609	191,881
Supplementary schedule of non-cash investing and financing activities:
Cash paid for interest	27,749	30,043	29,377
Cash paid for income taxes, net of (refunds received)	33,318	30,072	32,332
Change in unrealized gain/ (loss) on securities available for sale, net of tax	(1,488)	3,740	(7,169)
Change in unrealized gain/ (loss) on cash flow hedges, net of tax	800	(160)	1,206
Change in unrealized gain/ (loss) on other, net of tax	115	80	358
Loans transferred into/(out of) held for sale from/(to) portfolio	0	56,967	5,593
Loans charged-off	(2,036)	(5,296)	(5,417)
Loans transferred into other real estate owned from held for sale or portfolio	0	298	(372)
Reversal of contingent consideration	2,026	0	0
Equity issued for acquisitions, including deferred acquisition obligations	$ 0	$ 21,007	$ 0