Parent Company Only Financial Information (Tables)

12 Months Ended

Dec. 31, 2017

Condensed Financial Information of Parent Company Only Disclosure [Abstract]



	2017		2016
Assets:
Cash and cash equivalents	$	64,851	$	36,984
Investments in bank	3,855,483		1,579,728
Investments in consolidated subsidiaries	6,025		5,484
Investment in unconsolidated subsidiaries:
Statutory Trusts	3,995		2,476
Other investments	69,256		61,374
Current income tax receivable	20,017		6,831
Other assets	29,524		29,182
	$	4,049,151	$	1,722,059
Liabilities and stockholders' equity:
Income taxes payable to subsidiaries	24		—
Subordinated debt and other borrowings	337,818		223,337
Other liabilities	3,357		2,026
Stockholders' equity	3,707,952		1,496,696
	$	4,049,151	$	1,722,059

CONDENSED STATEMENTS OF OPERATIONS



	2017			2016			2015
Revenues:
Income from bank subsidiaries	$	63,100		27,663			19,038
Income from nonbank subsidiaries	297			5,198			210
Income from equity method investment	10,126			7,663			—
Other income (loss)	380			21			(132		)
Expenses:
Interest expense	9,856			1,997			220
Personnel expense, including stock compensation	16,629			10,971			7,342
Other expense	8,076			3,653			2,889
Income before income taxes and equity in undistributed income of subsidiaries	39,342			23,924			8,665
Income tax benefit	(12,748		)	(3,428		)	(4,119		)
Income before equity in undistributed income of subsidiaries	52,090			27,352			12,784
Equity in undistributed income of bank subsidiaries	121,341			104,318			81,536
Equity in undistributed income (loss) of nonbank subsidiaries	548			(4,445		)	1,189
Net income	$	173,979		$	127,225		$	95,509

CONDENSED STATEMENTS OF CASH FLOWS



	2017			2016			2015
Operating activities:
Net income	$	173,979		$	127,225		$	95,509
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Amortization and accretion	290			543			—
Stock-based compensation expense	19,538			10,971			7,342
Increase in income tax payable, net	24			(12		)	(10,870		)
Deferred tax expense	5,919			1,025			(394		)
Income from equity method investments, net	(10,368		)	(8,350		)	—
Excess tax benefit from stock compensation	(5,365		)	(4,604		)	(4,116		)
Loss (gain) on other investments	(350		)	497			132
Decrease in other assets	(3,989		)	2,636			1,194
Increase in other liabilities	(9,194		)	3,157			3,771
Equity in undistributed income of bank subsidiaries	(121,341		)	(104,318		)	(81,530		)
Equity in undistributed income of nonbank subsidiaries	(548		)	4,445			(1,189		)
Net cash provided by operating activities	48,595			33,215			9,849
Investing activities:
Investment in consolidated banking subsidiaries	(182,288		)	(118,878		)	—
Increase in equity method investment	—			(11,400		)	—
Dividends received from equity method investment	5,655			3,255			—
Increase in other investments	(815		)	(710		)	(335		)
Net cash used in investing activities	(177,448		)	(127,733		)	(335		)
Financing activities:
Net (decrease) increase in subordinated debt and other borrowings	(60		)	118,294			(13,682		)
Proceeds from common stock issuance	192,194			—			—
Exercise of common stock options and stock appreciation rights, net of repurchase of restricted shares	493			11,589			3,603
Excess tax benefit from stock compensation	—			4,604			4,116
Common dividends paid	(35,907		)	(24,725		)	(18,307		)
Net cash provided by (used in) financing activities	156,720			109,762			(24,270		)
Net increase (decrease) in cash	27,867			15,244			(14,756		)
Cash and cash equivalents, beginning of year	36,984			21,740			36,496
Cash and cash equivalents, end of year	$	64,851		$	36,984		$	21,740