Loans and Allowance for Credit Losses (Schedule of Commercial Credit Exposure Based on Internal Risk Ratings) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	$ 24,266,732	$ 23,765,053
Multi-family
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	962,546	1,154,738
Multi-family | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	807,537	970,337
Multi-family | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Multi-family | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	152,871	173,536
Multi-family | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	2,138	10,865
Multi-family | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Commercial real estate, Non-owner occupied
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	4,368,686	4,381,610
Commercial real estate, Non-owner occupied | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	4,131,403	3,892,353
Commercial real estate, Non-owner occupied | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	1,089	26,088
Commercial real estate, Non-owner occupied | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	219,370	423,918
Commercial real estate, Non-owner occupied | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	16,824	39,251
Commercial real estate, Non-owner occupied | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Construction and land
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	246,202	165,390
Construction and land | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	229,356	147,470
Construction and land | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	1,775	6,174
Construction and land | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	9,544	6,582
Construction and land | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	5,527	5,164
Construction and land | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Commercial real estate, Owner occupied
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	1,919,074	1,944,658
Commercial real estate, Owner occupied | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	1,791,869	1,750,035
Commercial real estate, Owner occupied | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	7,379	14,010
Commercial real estate, Owner occupied | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	99,635	160,159
Commercial real estate, Owner occupied | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	20,191	20,454
Commercial real estate, Owner occupied | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Commercial and industrial
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	5,786,907	4,790,275
Commercial and industrial | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	5,558,734	4,368,590
Commercial and industrial | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	16,696	102,321
Commercial and industrial | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	133,641	250,644
Commercial and industrial | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	52,358	40,958
Commercial and industrial | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	25,478	27,762
Payment Protection Plan [Member]
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	10,191	248,505
Payment Protection Plan [Member] | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	10,191	248,505
Payment Protection Plan [Member] | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Payment Protection Plan [Member] | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Payment Protection Plan [Member] | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Payment Protection Plan [Member] | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Pinnacle Public Finance [Member]
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	166,488	143,063
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	116,573	113,785
Financing Receivable, Originated Two Years before Latest Fiscal Year	71,996	88,206
Financing Receivable, Originated Three Years before Latest Fiscal Year	68,115	36,761
Financing Receivable, Originated Four Years before Latest Fiscal Year	30,613	177,258
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	478,402	360,568
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	932,187	919,641
Pinnacle Public Finance [Member] | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	166,488	143,063
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	116,573	113,785
Financing Receivable, Originated Two Years before Latest Fiscal Year	71,996	88,206
Financing Receivable, Originated Three Years before Latest Fiscal Year	68,115	36,761
Financing Receivable, Originated Four Years before Latest Fiscal Year	30,613	177,258
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	478,402	360,568
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	932,187	919,641
Pinnacle Public Finance [Member] | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Pinnacle Public Finance [Member] | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Pinnacle Public Finance [Member] | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Pinnacle Public Finance [Member] | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Bridge - franchise finance
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	40,586	49,949
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	35,514	58,408
Financing Receivable, Originated Two Years before Latest Fiscal Year	42,354	151,605
Financing Receivable, Originated Three Years before Latest Fiscal Year	85,432	52,607
Financing Receivable, Originated Four Years before Latest Fiscal Year	33,092	15,699
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	17,159	13,856
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	254,137	342,124
Bridge - franchise finance | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	40,586	49,949
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	33,743	51,057
Financing Receivable, Originated Two Years before Latest Fiscal Year	39,793	104,299
Financing Receivable, Originated Three Years before Latest Fiscal Year	60,311	10,199
Financing Receivable, Originated Four Years before Latest Fiscal Year	11,320	7,039
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	7,713	5,838
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	193,466	228,381
Bridge - franchise finance | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Bridge - franchise finance | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,771	7,351
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,561	39,588
Financing Receivable, Originated Three Years before Latest Fiscal Year	22,564	30,134
Financing Receivable, Originated Four Years before Latest Fiscal Year	17,714	8,660
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	9,446	8,018
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	54,056	93,751
Bridge - franchise finance | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	46,100	80,864
Bridge - franchise finance | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	7,956	12,887
Bridge - franchise finance | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	7,718
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,557	12,274
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,058	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	6,615	19,992
Bridge - equipment finance
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	24,384	73,190
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	62,829	18,763
Financing Receivable, Originated Two Years before Latest Fiscal Year	17,029	121,865
Financing Receivable, Originated Three Years before Latest Fiscal Year	98,549	48,601
Financing Receivable, Originated Four Years before Latest Fiscal Year	37,263	46,709
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	69,981	48,471
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	310,035	357,599
Bridge - equipment finance | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	24,384	73,190
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	62,829	18,763
Financing Receivable, Originated Two Years before Latest Fiscal Year	17,029	108,990
Financing Receivable, Originated Three Years before Latest Fiscal Year	96,994	43,826
Financing Receivable, Originated Four Years before Latest Fiscal Year	37,263	23,684
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	69,981	48,471
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	308,480	316,924
Bridge - equipment finance | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Bridge - equipment finance | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	12,875
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,555	4,775
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	23,025
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	1,555	40,675
Bridge - equipment finance | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	1,555	40,675
Bridge - equipment finance | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Bridge - equipment finance | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Mortgage warehouse lending [Member]
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	622,883	1,092,133
Financing Receivable, before Allowance for Credit Loss and Fee	622,883	1,092,133
Mortgage warehouse lending [Member] | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	622,883	1,092,133
Financing Receivable, before Allowance for Credit Loss and Fee	622,883	1,092,133
Mortgage warehouse lending [Member] | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Mortgage warehouse lending [Member] | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Mortgage warehouse lending [Member] | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Mortgage warehouse lending [Member] | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	0	0
Commercial Portfolio Segment [Member]
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	15,412,848	15,396,673
Commercial Portfolio Segment [Member] | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	14,586,106	13,934,369
Commercial Portfolio Segment [Member] | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	26,939	148,593
Commercial Portfolio Segment [Member] | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	662,716	1,136,378
Commercial Portfolio Segment [Member] | Substandard Non-Accruing
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	104,994	129,579
Commercial Portfolio Segment [Member] | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, before Allowance for Credit Loss and Fee	32,093	47,754
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	960,807	870,837
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	866,953	633,283
Financing Receivable, Originated Two Years before Latest Fiscal Year	573,385	1,500,258
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,298,695	732,095
Financing Receivable, Originated Four Years before Latest Fiscal Year	576,439	571,909
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,195,751	1,274,048
Financing Receivable, Revolving	105,404	119,308
Financing Receivable, before Allowance for Credit Loss and Fee	5,577,434	5,701,738
Commercial Real Estate Portfolio Segment [Member] | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	948,372	869,852
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	849,293	619,056
Financing Receivable, Originated Two Years before Latest Fiscal Year	548,136	1,283,401
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,171,466	676,151
Financing Receivable, Originated Four Years before Latest Fiscal Year	519,138	455,965
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,026,487	986,427
Financing Receivable, Revolving	105,404	119,308
Financing Receivable, before Allowance for Credit Loss and Fee	5,168,296	5,010,160
Commercial Real Estate Portfolio Segment [Member] | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	985
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	0	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	29,573
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,775	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,089	1,704
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	2,864	32,262
Commercial Real Estate Portfolio Segment [Member] | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	12,435	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17,660	14,227
Financing Receivable, Originated Two Years before Latest Fiscal Year	25,249	187,284
Financing Receivable, Originated Three Years before Latest Fiscal Year	125,454	55,944
Financing Receivable, Originated Four Years before Latest Fiscal Year	57,301	115,944
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	168,175	285,917
Financing Receivable, Revolving	0	0
Financing Receivable, before Allowance for Credit Loss and Fee	406,274	659,316
Commercial and industrial Portfolio Segment
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,439,617	1,286,576
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	882,967	708,404
Financing Receivable, Originated Two Years before Latest Fiscal Year	518,491	1,078,840
Financing Receivable, Originated Three Years before Latest Fiscal Year	837,936	482,679
Financing Receivable, Originated Four Years before Latest Fiscal Year	452,735	406,561
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,019,263	803,611
Financing Receivable, Revolving	2,565,163	2,216,767
Financing Receivable, before Allowance for Credit Loss and Fee	7,716,172	6,983,438
Commercial and industrial Portfolio Segment | Pass
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,438,322	1,280,160
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	845,448	666,437
Financing Receivable, Originated Two Years before Latest Fiscal Year	490,571	870,797
Financing Receivable, Originated Three Years before Latest Fiscal Year	724,835	406,145
Financing Receivable, Originated Four Years before Latest Fiscal Year	428,081	353,590
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	906,089	669,308
Financing Receivable, Revolving	2,527,448	2,120,693
Financing Receivable, before Allowance for Credit Loss and Fee	7,360,794	6,367,130
Commercial and industrial Portfolio Segment | Special mention
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	47	6,051
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	2,349	19,861
Financing Receivable, Originated Two Years before Latest Fiscal Year	212	39,647
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,968	17,185
Financing Receivable, Originated Four Years before Latest Fiscal Year	414	1,854
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,699	11,640
Financing Receivable, Revolving	15,386	20,093
Financing Receivable, before Allowance for Credit Loss and Fee	24,075	116,331
Commercial and industrial Portfolio Segment | Substandard
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	1,248	365
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	13,212	22,106
Financing Receivable, Originated Two Years before Latest Fiscal Year	27,708	167,496
Financing Receivable, Originated Three Years before Latest Fiscal Year	109,133	59,349
Financing Receivable, Originated Four Years before Latest Fiscal Year	24,240	51,117
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	111,475	122,663
Financing Receivable, Revolving	18,809	49,119
Financing Receivable, before Allowance for Credit Loss and Fee	305,825	472,215
Commercial and industrial Portfolio Segment | Doubtful
Financing Receivable Recorded Investment [Line Items]
Financing Receivable, Originated in Current Fiscal Year	0	0
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	21,958	0
Financing Receivable, Originated Two Years before Latest Fiscal Year	0	900
Financing Receivable, Originated Three Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Four Years before Latest Fiscal Year	0	0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	0	0
Financing Receivable, Revolving	3,520	26,862
Financing Receivable, before Allowance for Credit Loss and Fee	$ 25,478	$ 27,762