Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

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, 2017	$	1,808,002		$	56,710		$	1,864,712
Acquisitions	—			—			—
Amortization	—			(10,549		)	(10,549		)
Change in purchase price allocation of prior acquisitions	(881		)	—			(881		)
Balance at December 31, 2018	$	1,807,121		$	46,161		$	1,853,282

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, which are subject to amortization (in thousands):



	December 31, 2018			December 31, 2017
Gross carrying amount	$	92,787		$	92,787
Accumulated amortization	(46,626		)	(36,077		)
Net book value	$	46,161		$	56,710

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, 2018 as follows (in thousands):



	For the years ended December 31,
	2018		2017		2016
Cash Payments:
Interest	$	199,464	$	91,628	$	37,003
Income taxes paid	55,626		81,539		49,504
Noncash Transactions:
Loans charged-off to the allowance for loan losses	30,400		22,046		31,112
Loans foreclosed upon with repossessions transferred to other real estate	3,524		6,228		4,453
Loans foreclosed upon with repossessions transferred to other repossessed assets	1,899		646		1,842
Other real estate sales financed	891		908		—
Available-for-sale securities transferred to held-to-maturity portfolio	179,763		—		—
Held-for-sale loans transferred to held-for-investment loan portfolio	44,980		—		—
Common stock issued in connection with acquisitions	—		1,850,968		222,162

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, 2018 (dollars in thousands):



	December 31, 2018		December 31, 2017		December 31, 2016
Basic earnings per share calculation:
Numerator - Net income	$	359,440	$	173,979	$	127,225

Denominator – Weighted average common shares outstanding	77,111,372		63,760,578		43,037,083
Basic net income per common share	$	4.66	$	2.73	$	2.96

Diluted earnings per share calculation:
Numerator - Net income	$	359,440	$	173,979	$	127,225

Denominator – Weighted average common shares outstanding	77,111,372		63,760,578		43,037,083
Dilutive shares contingently issuable	338,545		567,611		694,909
Weighted average diluted common shares outstanding	77,449,917		64,328,189		43,731,992
Diluted net income per common share	$	4.64	$	2.70	$	2.91