New Financial Accounting Pronouncements - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
Operating lease, right-of-use asset	$ 13,056	$ 13,300
Operating lease liability	$ 13,138	13,300
Prior sales lease back transaction net of tax		$ 4,600