Premises and Equipment, Net and Other Assets (Tables)

12 Months Ended

Dec. 31, 2017

Property Plant And Equipment [Abstract]

Summary of Premises and Equipment by Classification

The following is a summary of premises and equipment by classification:

		December 31,
	Estimated Useful Lives	2017			2016
		(Dollars in thousands)
Land		$	34,833		$	32,441
Buildings	10 to 40 years		145,051			138,901
Furniture, fixtures and equipment	3 to 15 years		69,915			64,293
Accumulated depreciation			(115,711	)		(108,864	)
Premises and equipment, net		$	134,088		$	126,771