Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Activity for Goodwill and Other Intangible Assets

The following table presents activity for goodwill and other intangible assets (in thousands):


	Goodwill		Core deposit and other intangible assets		Total
Balance at December 31, 2019	$	1,819,811	$	51,130	$	1,870,941
Purchase of trade name	—		1,000		1,000
Amortization	—		(9,793)		(9,793)
Balance at December 31, 2020	$	1,819,811	$	42,336	$	1,862,147

Gross Carrying Amount and Accumulated Amortization for the Core Deposit and Other Intangible Assets

The following table presents the gross carrying amount and accumulated amortization for the core deposit and other intangible assets (in thousands):


	December 31, 2020		December 31, 2019
Gross carrying amount	$	108,665	$	107,665
Accumulated amortization	(66,329)		(56,535)
Net book value	$	42,336	$	51,130

Supplemental Cash Flow Information

Cash Equivalents and Cash Flows — Cash on hand, cash items in process of collection, amounts due from banks, Federal funds sold, short-term discount notes and securities purchased under agreements to resell, with original maturities within ninety days, are included in cash and cash equivalents. The following supplemental cash flow information addresses certain cash payments and noncash transactions for each of the years in the three-year period ended December 31, 2020 as follows (in thousands):


	For the years ended December 31,
	2020		2019		2018
Cash Payments:
Interest	$	215,888	$	287,272	$	199,464
Income taxes paid	110,798		86,960		55,626
Noncash Transactions:
Loans charged-off to the allowance for credit losses	49,333		28,467		30,400
Loans foreclosed upon with repossessions transferred to other real estate	3,436		17,937		3,524
Loans foreclosed upon with repossessions transferred to other repossessed assets	25		93		1,899
Other real estate sales financed	—		871		891
Fixed assets transferred to other real estate	—		8,182		—
Available-for-sale securities transferred to held-to-maturity portfolio	873,613		—		179,763
Held-for-sale loans transferred to held-for-investment loan portfolio	—		—		44,980

Right-of-use assets recognized in the period in exchange for lease obligations(1)	15,820		90,927		—

(1) Includes $79.9 million recognized upon initial adoption of ASU 2016-02 on January 1, 2019.

Basic and Diluted Earnings Per Share Calculations

The following is a summary of the basic and diluted earnings per share calculation for each of the years in the three-year period ended December 31, 2020 (dollars in thousands except earnings per share):


	December 31, 2020		December 31, 2019		December 31, 2018
Basic earnings per common share calculation:
Numerator - Net income available to common shareholders	$	304,725	$	400,881	$	359,440

Denominator – Weighted average common shares outstanding	75,376,489		76,364,303		77,111,372
Basic net income per common share	$	4.04	$	5.25	$	4.66

Diluted earnings per common share calculation:
Numerator - Net income available to common shareholders	$	304,725	$	400,881	$	359,440

Denominator – Weighted average common shares outstanding	75,376,489		76,364,303		77,111,372
Dilutive shares contingently issuable	277,896		399,600		338,545
Weighted average diluted common shares outstanding	75,654,385		76,763,903		77,449,917
Diluted net income per common share	$	4.03	$	5.22	$	4.64