Financing receivable cumulative effect of change in accounting principle.

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- Definition

Provision for losses on unfunded commitments.

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Reserve for unfunded lending commitments.

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Reserve for unfunded lending commitments collectively evaluated for impairment.

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Reserve for unfunded lending commitments cumulative effect of change in accounting principle.

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Reserve for unfunded lending commitments individually evaluated for Impairment.

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Reserve for loans impairments recorded after acquisition as a result of current information and events which result in it being probable that estimated cash flows will be less than previously expected or because actual cash flows are less than cash flows previously expected. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that was acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Amount, before allowance for credit loss, of financing receivable.

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Amount of expense related to estimated loss from loan and lease transactions.

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Loans and Allowance for Credit Losses (Allowance for Credit Losses by Portfolio Class) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Beginning balance			$ 191,251	$ 194,514
Allowance for loan losses: Net provision for loan losses	$ 24,999	$ 12,421	578,690	38,552
Allowance for loan losses: Ending balance	448,674	195,572	448,674	195,572
Reserve for unfunded lending commitments: Beginning balance			3,974
Reserve for unfunded lending commitments: Cumulative effect of change in accounting principle			27,330
Reserve for unfunded lending commitments: Provision for losses			222
Reserve for unfunded lending commitments: Ending balance	31,526		31,526
Total allowance for credit losses	480,200		480,200		$ 271,966	$ 195,225
Allowance for loan losses: Individually evaluated	29,713	12,218	29,713	12,218
Allowance for loan losses: Amounts related to purchased credit impaired loans		8,823		8,823
Allowance for loan losses: Collectively evaluated	418,961	174,531	418,961	174,531
Reserve for unfunded lending commitments: Individually evaluated	997		997
Reserve for unfunded lending commitments: Collectively evaluated	30,529		30,529
Loans: Individually evaluated	101,637	225,138	101,637	225,138
Loans: Purchased credit impaired loans		228,620		228,620
Purchased credit impaired loans	22,138,567	20,582,194	22,138,567	20,582,194
Loans receivable	22,240,204	21,035,952	22,240,204	21,035,952		21,212,755
Non-Purchased Credit Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Cumulative effect of change in accounting principle			49,411
Allowance for loan losses: Charge-offs			(381,979)	(47,365)
Allowance for loan losses: Recoveries			11,523	9,871
Allowance for loan losses: Net provision for loan losses			578,468	38,552
Total Commercial [Member] \| Commercial Real Estate - Income Producing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Beginning balance			20,869	17,638
Allowance for loan losses: Ending balance	104,652	25,750	104,652	25,750
Reserve for unfunded lending commitments: Cumulative effect of change in accounting principle			449
Reserve for unfunded lending commitments: Provision for losses			1,599
Reserve for unfunded lending commitments: Ending balance	2,048		2,048
Total allowance for credit losses	106,700		106,700
Allowance for loan losses: Individually evaluated	24	49	24	49
Allowance for loan losses: Amounts related to purchased credit impaired loans		40		40
Allowance for loan losses: Collectively evaluated	104,628	25,661	104,628	25,661
Reserve for unfunded lending commitments: Collectively evaluated	2,048		2,048
Loans: Individually evaluated	5,549	2,781	5,549	2,781
Loans: Purchased credit impaired loans		27,281		27,281
Purchased credit impaired loans	3,401,005	3,030,506	3,401,005	3,030,506
Loans receivable	3,406,554	3,060,568	3,406,554	3,060,568		2,994,448
Total Commercial [Member] \| Construction and Land Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Beginning balance			9,350	15,647
Allowance for loan losses: Ending balance	29,695	9,766	29,695	9,766
Reserve for unfunded lending commitments: Cumulative effect of change in accounting principle			15,658
Reserve for unfunded lending commitments: Provision for losses			6,046
Reserve for unfunded lending commitments: Ending balance	21,704		21,704
Total allowance for credit losses	51,399		51,399
Allowance for loan losses: Individually evaluated	169	29	169	29
Allowance for loan losses: Amounts related to purchased credit impaired loans		144		144
Allowance for loan losses: Collectively evaluated	29,526	9,593	29,526	9,593
Reserve for unfunded lending commitments: Collectively evaluated	21,704		21,704
Loans: Individually evaluated	1,837	3,385	1,837	3,385
Loans: Purchased credit impaired loans		23,431		23,431
Purchased credit impaired loans	1,094,312	1,163,902	1,094,312	1,163,902
Loans receivable	1,096,149	1,190,718	1,096,149	1,190,718		1,157,451
Total Commercial [Member] \| Non-Purchased Credit Impaired Loans [Member] \| Commercial Real Estate - Income Producing [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Cumulative effect of change in accounting principle			7,287
Allowance for loan losses: Charge-offs			(2,211)	(10)
Allowance for loan losses: Recoveries			46	518
Allowance for loan losses: Net provision for loan losses			78,661	7,604
Total Commercial [Member] \| Non-Purchased Credit Impaired Loans [Member] \| Construction and Land Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Cumulative effect of change in accounting principle			7,478
Allowance for loan losses: Charge-offs			(7)	(7)
Allowance for loan losses: Recoveries			549	108
Allowance for loan losses: Net provision for loan losses			12,325	(5,982)
Total Commercial [Member] \| Total Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Beginning balance			117,409	111,509
Allowance for loan losses: Ending balance	214,072	113,748	214,072	113,748
Reserve for unfunded lending commitments: Beginning balance			3,974
Reserve for unfunded lending commitments: Cumulative effect of change in accounting principle			6,060
Reserve for unfunded lending commitments: Provision for losses			(3,599)
Reserve for unfunded lending commitments: Ending balance	6,435		6,435
Total allowance for credit losses	220,507		220,507
Allowance for loan losses: Individually evaluated	28,648	11,592	28,648	11,592
Allowance for loan losses: Amounts related to purchased credit impaired loans		307		307
Allowance for loan losses: Collectively evaluated	185,424	101,849	185,424	101,849
Reserve for unfunded lending commitments: Individually evaluated	992		992
Reserve for unfunded lending commitments: Collectively evaluated	5,443		5,443
Loans: Individually evaluated	84,263	213,088	84,263	213,088
Loans: Purchased credit impaired loans		78,164		78,164
Purchased credit impaired loans	12,952,932	11,336,131	12,952,932	11,336,131
Loans receivable	13,037,195	11,627,383	13,037,195	11,627,383		11,905,407
Total Commercial [Member] \| Total Commercial And Industrial [Member] \| Commercial Non-Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Beginning balance			106,432	97,752
Allowance for loan losses: Ending balance	148,051	99,299	148,051	99,299
Reserve for unfunded lending commitments: Beginning balance			3,974
Reserve for unfunded lending commitments: Cumulative effect of change in accounting principle			5,772
Reserve for unfunded lending commitments: Provision for losses			(3,786)
Reserve for unfunded lending commitments: Ending balance	5,960		5,960
Total allowance for credit losses	154,011		154,011
Allowance for loan losses: Individually evaluated	27,304	11,535	27,304	11,535
Allowance for loan losses: Amounts related to purchased credit impaired loans		135		135
Allowance for loan losses: Collectively evaluated	120,747	87,629	120,747	87,629
Reserve for unfunded lending commitments: Individually evaluated	992		992
Reserve for unfunded lending commitments: Collectively evaluated	4,968		4,968
Loans: Individually evaluated	73,139	201,979	73,139	201,979
Loans: Purchased credit impaired loans		33,040		33,040
Purchased credit impaired loans	10,184,649	8,657,985	10,184,649	8,657,985
Loans receivable	10,257,788	8,893,004	10,257,788	8,893,004		9,166,947
Total Commercial [Member] \| Total Commercial And Industrial [Member] \| Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Beginning balance			10,977	13,757
Allowance for loan losses: Ending balance	66,021	14,449	66,021	14,449
Reserve for unfunded lending commitments: Cumulative effect of change in accounting principle			288
Reserve for unfunded lending commitments: Provision for losses			187
Reserve for unfunded lending commitments: Ending balance	475		475
Total allowance for credit losses	66,496		66,496
Allowance for loan losses: Individually evaluated	1,344	57	1,344	57
Allowance for loan losses: Amounts related to purchased credit impaired loans		172		172
Allowance for loan losses: Collectively evaluated	64,677	14,220	64,677	14,220
Reserve for unfunded lending commitments: Collectively evaluated	475		475
Loans: Individually evaluated	11,124	11,109	11,124	11,109
Loans: Purchased credit impaired loans		45,124		45,124
Purchased credit impaired loans	2,768,283	2,678,146	2,768,283	2,678,146
Loans receivable	2,779,407	2,734,379	2,779,407	2,734,379		2,738,460
Total Commercial [Member] \| Total Commercial And Industrial [Member] \| Non-Purchased Credit Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Cumulative effect of change in accounting principle			14,633
Allowance for loan losses: Charge-offs			(365,951)	(33,519)
Allowance for loan losses: Recoveries			5,490	5,946
Allowance for loan losses: Net provision for loan losses			442,491	29,812
Total Commercial [Member] \| Total Commercial And Industrial [Member] \| Non-Purchased Credit Impaired Loans [Member] \| Commercial Non-Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Cumulative effect of change in accounting principle			(244)
Allowance for loan losses: Charge-offs			(364,123)	(33,382)
Allowance for loan losses: Recoveries			4,831	5,662
Allowance for loan losses: Net provision for loan losses			401,155	29,267
Total Commercial [Member] \| Total Commercial And Industrial [Member] \| Non-Purchased Credit Impaired Loans [Member] \| Commercial Real Estate - Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Cumulative effect of change in accounting principle			14,877
Allowance for loan losses: Charge-offs			(1,828)	(137)
Allowance for loan losses: Recoveries			659	284
Allowance for loan losses: Net provision for loan losses			41,336	545
Residential Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Beginning balance			20,331	23,782
Allowance for loan losses: Ending balance	51,773	21,479	51,773	21,479
Reserve for unfunded lending commitments: Cumulative effect of change in accounting principle			17
Reserve for unfunded lending commitments: Provision for losses			(11)
Reserve for unfunded lending commitments: Ending balance	6		6
Total allowance for credit losses	51,779		51,779
Allowance for loan losses: Individually evaluated	416	183	416	183
Allowance for loan losses: Amounts related to purchased credit impaired loans		8,032		8,032
Allowance for loan losses: Collectively evaluated	51,357	13,264	51,357	13,264
Reserve for unfunded lending commitments: Collectively evaluated	6		6
Loans: Individually evaluated	6,064	4,301	6,064	4,301
Loans: Purchased credit impaired loans		93,450		93,450
Purchased credit impaired loans	2,748,324	2,907,207	2,748,324	2,907,207
Loans receivable	2,754,388	3,004,958	2,754,388	3,004,958		2,990,631
Residential Mortgages [Member] \| Non-Purchased Credit Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Cumulative effect of change in accounting principle			12,921
Allowance for loan losses: Charge-offs			(170)	(660)
Allowance for loan losses: Recoveries			1,078	433
Allowance for loan losses: Net provision for loan losses			17,613	(2,076)
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Beginning balance			23,292	25,938
Allowance for loan losses: Ending balance	48,482	24,829	48,482	24,829
Reserve for unfunded lending commitments: Cumulative effect of change in accounting principle			5,146
Reserve for unfunded lending commitments: Provision for losses			(3,813)
Reserve for unfunded lending commitments: Ending balance	1,333		1,333
Total allowance for credit losses	49,815		49,815
Allowance for loan losses: Individually evaluated	456	365	456	365
Allowance for loan losses: Amounts related to purchased credit impaired loans		300		300
Allowance for loan losses: Collectively evaluated	48,026	24,164	48,026	24,164
Reserve for unfunded lending commitments: Individually evaluated	5		5
Reserve for unfunded lending commitments: Collectively evaluated	1,328		1,328
Loans: Individually evaluated	3,924	1,583	3,924	1,583
Loans: Purchased credit impaired loans		6,294		6,294
Purchased credit impaired loans	1,941,994	2,144,448	1,941,994	2,144,448
Loans receivable	$ 1,945,918	$ 2,152,325	1,945,918	2,152,325		$ 2,164,818
Consumer [Member] \| Non-Purchased Credit Impaired Loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance for loan losses: Cumulative effect of change in accounting principle			7,092
Allowance for loan losses: Charge-offs			(13,640)	(13,169)
Allowance for loan losses: Recoveries			4,360	2,866
Allowance for loan losses: Net provision for loan losses			$ 27,378	$ 9,194