Parent Holding Company Information (Condensed) (Tables)

12 Months Ended

Dec. 31, 2015

Condensed Financial Information of Parent Company Only Disclosure [Abstract]

Condensed Statements of Financial Condition

Condensed Statements of Financial Condition

(Dollars in thousands)	December 31, 2015		December 31, 2014
Assets
Cash on hand and in banks	$	1,854	4,019
Interest bearing cash deposits	46,808		51,127
Cash and cash equivalents	48,662		55,146
Investment securities, available-for-sale	65		91
Other assets	11,553		8,511
Investment in subsidiaries	1,175,844		1,121,937
Total assets	$	1,236,124	1,185,685
Liabilities and Stockholders’ Equity
Dividends payable	$	22,893	22,557
Subordinated debentures	125,848		125,705
Other liabilities	10,733		9,376
Total liabilities	159,474		157,638
Common stock	761		750
Paid-in capital	736,368		708,356
Retained earnings	337,532		301,197
Accumulated other comprehensive income	1,989		17,744
Total stockholders’ equity	1,076,650		1,028,047
Total liabilities and stockholders’ equity	$	1,236,124	1,185,685

Condensed Statements of Operations and Comprehensive Income

Condensed Statements of Operations and Comprehensive Income

	Years ended
(Dollars in thousands)	December 31, 2015		December 31, 2014	December 31, 2013
Income
Dividends from subsidiaries	$	109,000	78,500	65,445
Loss on sale of investments	—		—	(3,248	)
Other income	196		199	966
Intercompany charges for services	10,562		9,283	7,387
Total income	119,758		87,982	70,550
Expenses
Compensation and employee benefits	13,205		10,773	9,175
Other operating expenses	7,313		6,824	6,536
Total expenses	20,518		17,597	15,711
Income before income tax benefit and equity in undistributed net income of subsidiaries	99,240		70,385	54,839
Income tax benefit	3,105		2,919	3,676
Income before equity in undistributed net income of subsidiaries	102,345		73,304	58,515
Equity in undistributed net income of subsidiaries	13,782		39,451	37,129
Net Income	$	116,127	112,755	95,644
Comprehensive Income	$	100,372	120,854	57,327

Condensed Statements of Cash Flows

Condensed Statements of Cash Flows

	Years ended
(Dollars in thousands)	December 31, 2015			December 31, 2014		December 31, 2013
Operating Activities
Net income	$	116,127		112,755		95,644
Adjustments to reconcile net income to net cash provided by operating activities:
Subsidiary income in excess of dividends distributed	(13,782		)	(39,451	)	(37,129	)
Loss on sale of investments	—			—		3,248
Excess tax (benefits) deficiencies from stock-based compensation	(102		)	(138	)	223
Net change in other assets and other liabilities	307			140		2,575
Net cash provided by operating activities	102,550			73,306		64,561
Investing Activities
Sales of available-for-sale securities	—			—		23,990
Maturities, prepayments and calls of available-for-sale securities	—			—		2,571
Changes in investment securities and other stock - intercompany	—			—		(946	)
Net addition of premises and equipment	(1,405		)	(179	)	(603	)
Net sale (purchase) of non-marketable equity securities	22			(667	)	—
Equity contributions to subsidiaries	(28,457		)	(18,115	)	(11,336	)
Net cash (used in) provided by investing activities	(29,840		)	(18,961	)	13,676
Financing Activities
Net increase in other borrowed funds	143			143		144
Cash dividends paid	(79,456		)	(50,944	)	(44,232	)
Excess tax benefits (deficiencies) from stock-based compensation	102			138		(223	)
Stock-based compensation activity	17			785		4,326
Net cash used in financing activities	(79,194		)	(49,878	)	(39,985	)
Net (decrease) increase in cash and cash equivalents	(6,484		)	4,467		38,252
Cash and cash equivalents at beginning of year	55,146			50,679		12,427
Cash and cash equivalents at end of year	$	48,662		55,146		50,679