Operating Expenses (Tables)

12 Months Ended

Dec. 31, 2016

Operating Expenses [Abstract]

Schedule of major categories of operating expenses

The following schedule includes the major categories of operating expenses during the past three years:

	Years Ended December 31,
(Dollars in thousands)	2016			2015		2014
Salaries and wages	$	135,407		$	104,490	$	83,229
Employee benefits	29,806			23,430		19,328
Occupancy	23,525			18,213		15,842
Equipment and software	24,408			18,569		14,737
Outside processing and service fees	21,199			15,207		11,586
FDIC insurance premiums	7,407			5,485		4,307
Professional fees	5,832			4,842		3,570
Intangible asset amortization	5,524			4,389		2,029
Postage and express mail	3,777			3,313		3,418
Advertising and marketing	3,740			3,288		3,051
Training, travel and other employee expenses	4,025			3,224		2,480
Telephone	2,964			2,608		1,966
Supplies	2,318			2,216		1,897
Donations	1,951			1,375		1,155
Credit-related expenses	(2,701		)	632		996
Merger and acquisition-related transaction expenses	61,134			7,804		6,388
Other	8,102			4,809		3,946
Total operating expenses	$	338,418		$	223,894	$	179,925