Income Taxes (Detail) - Narrative - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes [Line Items]
Deferred tax assets, net	$ 86,693	$ 91,685
Acquired thrift's tax bad debt reserve	2,500	2,500	$ 2,500
Unrecognized tax benefit that would affect effective tax rate	936,000	597,000	$ 181,000
Peoples' Bank and Great Lakes Acquisitions [Member]
Income Taxes [Line Items]
Deferred tax assets, net	$ 3,500
Popular National Machine Tool and Great Lake Acquisitions
Income Taxes [Line Items]
Deferred tax assets, net		$ 7,400