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Number of shares of equity interests issued or issuable to acquire entity.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Mergers and Acquisitions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	Nov. 22, 2019	Mar. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Total Assets		$ 15,995,572	$ 15,720,112
Old Line [Member]
Business Acquisition [Line Items]
Total Assets	$ 3,000,000
Portfolio loans, net of unearned income	2,514,300
Securities	182,455
Value of acquisition	$ 493,952
Closing stock price	$ 36.75
Number of shares issued for acquisition	13,351,837
Business acquisition, fair value	$ 3,300
Goodwill acquired	228,757
Purchase price allocation in core deposit intangible	32,899
Merger related expense		$ 5,200
Community Banking [Member] \| Old Line [Member]
Business Acquisition [Line Items]
Purchase price allocation in core deposit intangible	$ 32,900