XML 36 R30.htm IDEA: XBRL DOCUMENT

Business - Additional Information (Detail) $ in Millions	Oct. 14, 2015 USD ($) Branch	Sep. 30, 2015 FinancialCenters Subsidiary
Schedule Of Description Of Company [Line Items]
Number of inactive subsidiaries \| Subsidiary		1
Bank operated Business Financial Centers, number		40
Bank operated Commercial Banking Centers, number		7
Bank operated trust offices, number		3
County Commerce Bank [Member] \| Subsequent Event [Member]
Schedule Of Description Of Company [Line Items]
Total assets of merger company \| $	$ 250
Number of branches owned by merger company \| Branch	4