Information of Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Mar. 31, 2019		Dec. 31, 2018
Liabilities:
Junior subordinated notes, at fair value	$ 5,500		$ 6,110
Total liabilities	5,500		6,110
Significant Unobservable Inputs (Level 3)
Liabilities:
Junior subordinated notes, at fair value	5,500	[1]	6,110	[2]
Total liabilities	$ 5,500	[1]	$ 6,110	[2]

[1] During the three months ended March 31, 2019, there were no transfers between Level 1 and Level 2, and there were no transfers into and/or out of Level 3.

[2] During the year ended December 31, 2018, there were no transfers between Level 1 and Level 2, and there were no transfers into and/or out of Level 3.