Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Interest Income (Expense), Net		$ 56,627	$ 49,871	$ 167,414	$ 148,919
Noninterest Income		40,267	40,012	114,791	114,829
Revenues		96,894	89,883	282,205	263,748
Provision/ (credit) for loan losses		(432)	(138)	(6,727)	(5,806)
Noninterest Expense		69,346	61,670	205,947	193,110
Income before income taxes		27,980	28,351	82,985	76,444
Income tax expense		8,289	8,652	24,805	23,716
Net income from continuing operations		19,691	19,699	58,180	52,728
Net income attributable to noncontrolling interests		1,074	1,110	3,190	3,010
Net income from discontinued operations		1,186	1,047	3,881	4,357
Net income attributable to the Company		19,803	19,636	58,871	54,075
Total assets		8,269,398	7,681,550	8,269,398	7,681,550	$ 7,970,474
Amortization of intangibles		1,426	1,568	4,278	4,740
Depreciation		2,060	1,706	6,040	5,080
Private Banking Segment [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net		57,295	50,419	169,334	150,553
Noninterest Income		3,720	5,528	8,182	11,132
Revenues		61,015	55,947	177,516	161,685
Provision/ (credit) for loan losses		(432)	(138)	(6,727)	(5,806)
Noninterest Expense		38,482	30,439	110,444	93,808
Income before income taxes		22,965	25,646	73,799	73,683
Income tax expense		6,634	8,226	22,112	23,638
Net income from continuing operations		16,331	17,420	51,687	50,045
Net income attributable to the Company		16,331	17,420	51,687	50,045
Total assets		8,113,836	7,512,884	8,113,836	7,512,884
Depreciation		1,431	1,094	4,145	3,365
Wealth Management and Trust Segment [Member]
Segment Reporting Information [Line Items]
Noninterest Income		11,739	10,921	33,934	33,277
Noninterest Expense	[1]	11,752	12,307	37,562	41,897
Income before income taxes		(13)	(1,386)	(3,628)	(8,620)
Income tax expense		(125)	(538)	(1,530)	(3,448)
Net income from continuing operations		112	(848)	(2,098)	(5,172)
Net income attributable to the Company		112	(848)	(2,098)	(5,172)
Total assets		73,511	86,349	73,511	86,349
Amortization of intangibles		727	745	2,181	2,235
Depreciation		330	317	1,008	818
Investment Managers Segment [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net		8	4	16	12
Noninterest Income		11,280	10,717	33,230	32,023
Revenues		11,288	10,721	33,246	32,035
Noninterest Expense		8,407	7,986	25,107	23,904
Income before income taxes		2,881	2,735	8,139	8,131
Income tax expense		981	898	2,719	2,675
Net income from continuing operations		1,900	1,837	5,420	5,456
Net income attributable to noncontrolling interests		451	507	1,425	1,453
Net income attributable to the Company		1,449	1,330	3,995	4,003
Total assets		93,910	93,669	93,910	93,669
Amortization of intangibles		650	650	1,951	1,951
Depreciation		62	68	189	215
Wealth Advisors Segment [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net		36	4	82	10
Noninterest Income		13,299	12,778	39,122	38,099
Revenues		13,335	12,782	39,204	38,109
Noninterest Expense		9,174	8,975	27,560	27,839
Income before income taxes		4,161	3,807	11,644	10,270
Income tax expense		1,562	1,398	4,360	3,812
Net income from continuing operations		2,599	2,409	7,284	6,458
Net income attributable to noncontrolling interests		623	603	1,765	1,557
Net income attributable to the Company		1,976	1,806	5,519	4,901
Total assets		77,289	79,133	77,289	79,133
Amortization of intangibles		49	173	146	554
Depreciation		237	219	698	653
Holding Company and Eliminations Segment [Member]
Segment Reporting Information [Line Items]
Interest Income (Expense), Net		(711)	(556)	(2,018)	(1,656)
Noninterest Income		229	68	323	298
Revenues		(482)	(488)	(1,695)	(1,358)
Noninterest Expense		1,531	1,963	5,274	5,662
Income before income taxes		(2,013)	(2,451)	(6,969)	(7,020)
Income tax expense		(763)	(1,332)	(2,856)	(2,961)
Net income from continuing operations		(1,250)	(1,119)	(4,113)	(4,059)
Net income from discontinued operations		1,186	1,047	3,881	4,357
Net income attributable to the Company		(64)	(72)	(232)	298
Total assets		(89,148)	(90,485)	(89,148)	(90,485)
Depreciation		$ 0	$ 8	$ 0	$ 29

[1] Operating expense related to the Wealth Management and Trust segment includes no restructuring expense for the three and nine months ended September 30, 2017. There was no restructuring expense for the three months ended September 30, 2016 and $2.0 million of restructuring expense for the nine months ended September 30, 2016