Segment Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Summary of Certain Operating Information for Reportable Segments

The following is a summary of certain operating information for reportable segments:

(Dollars in thousands)	Community Banking		Specialty Finance		Wealth Management		Total Operating Segments		Intersegment Eliminations			Consolidated
2017
Net interest income	$	677,481	$	118,320	$	18,919	$	814,720	$	17,356		$	832,076
Provision for credit losses	27,059		2,709		—		29,768		—			29,768
Non-interest income	211,354		60,405		84,312		356,071		(36,565		)	319,506
Non-interest expense	599,455		74,559		77,012		751,026		(19,209		)	731,817
Income tax expense	87,486		35,775		9,054		132,315		—			132,315
Net income	$	174,835	$	65,682	$	17,165	$	257,682	$	—		$	257,682
Total assets at end of year	$	22,781,923	$	4,515,766	$	618,281	$	27,915,970	$	—		$	27,915,970
2016
Net interest income	$	588,847	$	98,248	$	18,611	$	705,706	$	16,487		$	722,193
Provision for credit losses	30,862		3,222		—		34,084		—			34,084
Non-interest income	230,414		49,706		78,478		358,598		(33,168		)	325,430
Non-interest expense	556,798		66,460		75,108		698,366		(16,681		)	681,685
Income tax expense	86,933		29,512		8,534		124,979		—			124,979
Net income	$	144,668	$	48,760	$	13,447	$	206,875	$	—		$	206,875
Total assets at end of year	$	21,172,080	$	3,884,373	$	612,100	$	25,668,553	$	—		$	25,668,553
2015
Net interest income	$	523,112	$	85,258	$	17,012	$	625,382	$	16,147		$	641,529
Provision for credit losses	29,746		3,196		—		32,942		—			32,942
Non-interest income	191,248		33,625		75,496		300,369		(28,772		)	271,597
Non-interest expense	522,199		47,245		71,600		641,044		(12,625		)	628,419
Income tax expense	60,488		26,352		8,176		95,016		—			95,016
Net income	$	101,927	$	42,090	$	12,732	$	156,749	$	—		$	156,749
Total assets at end of year	$	19,244,111	$	3,116,348	$	548,889	$	22,909,348	$	—		$	22,909,348