Segment Information (Summary Of Financial Information By Reportable Segment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Net interest income	$ 212,078	$ 209,198	$ 418,803	$ 426,900
Provision for loan and lease losses	10,657	10,589	22,329	15,412
Non-interest income	71,119	74,659	131,344	120,610
Non-interest expense	184,021	188,511	366,735	372,500
Income before provision for income taxes	88,519	84,757	161,083	159,598
Provision for income taxes	31,707	30,470	58,268	57,742
Net income	56,812	54,287	102,815	101,856	$ 232,940
Total assets	25,257,784		25,257,784		24,813,119
Loans and leases	18,321,142	17,355,240	18,321,142	17,355,240	17,508,663
Total deposits	19,459,950		19,459,950		19,020,985
Commercial Bank
Segment Reporting Information [Line Items]
Net interest income	106,307	104,206	210,062	208,005
Provision for loan and lease losses	7,784	9,460	16,893	12,776
Non-interest income	14,986	11,148	27,460	20,270
Non-interest expense	53,112	49,664	106,525	100,027
Income before provision for income taxes	60,397	56,230	114,104	115,472
Provision for income taxes	22,347	20,805	42,218	42,725
Net income	38,050	35,425	71,886	72,747
Total assets	13,362,082		13,362,082		12,829,249
Loans and leases	13,179,056		13,179,056		12,640,383
Total deposits	3,358,218		3,358,218		3,288,837
Wealth Management
Segment Reporting Information [Line Items]
Net interest income	5,402	5,214	10,642	10,568
Provision for loan and lease losses	175	74	375	368
Non-interest income	4,479	5,158	9,227	9,719
Non-interest expense	8,732	9,328	17,205	18,682
Income before provision for income taxes	974	970	2,289	1,237
Provision for income taxes	360	359	847	458
Net income	614	611	1,442	779
Total assets	437,709		437,709		437,058
Loans and leases	424,442		424,442		415,737
Total deposits	980,497		980,497		1,011,454
Retail Bank
Segment Reporting Information [Line Items]
Net interest income	69,464	61,222	135,953	123,600
Provision for loan and lease losses	2,852	1,432	4,668	3,578
Non-interest income	15,670	15,919	30,501	30,631
Non-interest expense	72,084	72,988	143,778	146,503
Income before provision for income taxes	10,198	2,721	18,008	4,150
Provision for income taxes	3,773	1,007	6,663	1,536
Net income	6,425	1,714	11,345	2,614
Total assets	2,012,254		2,012,254		1,893,433
Loans and leases	1,942,451		1,942,451		1,806,554
Total deposits	12,402,937		12,402,937		12,032,906
Home Lending
Segment Reporting Information [Line Items]
Net interest income	9,234	10,325	19,270	19,192
Provision for loan and lease losses	260	(963)	287	(2,498)
Non-interest income	34,637	40,945	61,517	56,688
Non-interest expense	40,542	43,160	79,696	81,483
Income before provision for income taxes	3,069	9,073	804	(3,105)
Provision for income taxes	1,136	3,357	297	(1,149)
Net income	1,933	5,716	507	(1,956)
Total assets	3,411,380		3,411,380		3,243,600
Loans and leases	2,795,809		2,795,809		2,685,181
Total deposits	258,697		258,697		229,358
Corporate & Other
Segment Reporting Information [Line Items]
Net interest income	21,671	28,231	42,876	65,535
Provision for loan and lease losses	(414)	586	106	1,188
Non-interest income	1,347	1,489	2,639	3,302
Non-interest expense	9,551	13,371	19,531	25,805
Income before provision for income taxes	13,881	15,763	25,878	41,844
Provision for income taxes	4,091	4,942	8,243	14,172
Net income	9,790	$ 10,821	17,635	$ 27,672
Total assets	6,034,359		6,034,359		6,409,779
Loans and leases	(20,616)		(20,616)		(39,192)
Total deposits	$ 2,459,601		$ 2,459,601		$ 2,458,430