Premises and Equipment (Tables)

12 Months Ended

Dec. 31, 2017

Property, Plant and Equipment [Abstract]

Summary of Premises and Equipment

The composition of premises and equipment was as follows at December 31:

	December 31,
(dollars in thousands)	2017			2016
Land	$	73,046		$	71,769
Buildings		343,833			322,165
Furniture, fixtures, and equipment		94,254			102,631
Leasehold improvements		38,918			28,555
Total		550,051			525,120
Accumulated depreciation		(91,977	)		(95,498	)
Premises and equipment, net	$	458,074		$	429,622

Summary of Future Minimum Lease Commitments

The following is a summary of future minimum lease commitments as of December 31, 2017:

(dollars in thousands)
2018	$	18,919
2019		17,463
2020		16,865
2021		15,960
2022		13,759
Thereafter		63,828
Total	$	146,794