Financial Instruments with Off-Balance-Sheet Risk and Concentrations of Credit Risk (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Summary of Approximate Contract Amounts of Collateral or Other Security to Support Financial Instruments with Credit Risk

Lakeland generally requires collateral or other security to support financial instruments with credit risk. The approximate contract amounts are as follows:

	December 31,
	2017		2016
	(in thousands)
Financial instruments whose contract amounts represent credit risk
Commitments to extend credit	$	966,441	$	921,979
Standby letters of credit and financial guarantees written	14,832		15,170