Other Noninterest Income and Other Noninterest Expense (Tables)

12 Months Ended

Dec. 31, 2017

Noninterest Expense [Abstract]

Schedule of Other Operating Cost and Expense, by Component

(Dollars in thousands)	2017		2016		2015
Processing fees paid to third parties	25,673		18,976		18,779
Cardholder reward programs	9,956		10,615		11,069
Telecommunications	12,172		14,496		14,406
Consultant	14,963		10,931		8,925
Core deposit intangible amortization	17,194		16,851		18,892
Advertising	11,227		10,239		12,431
Other	95,014		98,607		87,938
Total other noninterest expense	$	186,199	$	180,715	$	172,440