Stock-Based Compensation - Estimated Annual Expense (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Estimated Annual Stock-Based Compensation Expense
2014	$ 1,006
2015	415
2016	185
2017	77
2018	0
Total	$ 1,683

Share-based Compensation Arrangement, Future Expense, Five Years

No definition available.

Name:	bbcn_ShareBasedCompensationArrangementFutureExpenseFiveYears
Namespace Prefix:	bbcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Share-based Compensation Arrangement, Future Expense, Four Years

No definition available.

Name:	bbcn_ShareBasedCompensationArrangementFutureExpenseFourYears
Namespace Prefix:	bbcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Share-based Compensation Arrangement, Future Expense, Three Years

No definition available.

Name:	bbcn_ShareBasedCompensationArrangementFutureExpenseThreeYears
Namespace Prefix:	bbcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Share-based Compensation Arrangement, Future Expense, Two Years

No definition available.

Name:	bbcn_ShareBasedCompensationArrangementFutureExpenseTwoYears
Namespace Prefix:	bbcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Share-based Compensation Arrangements, Future Expense

No definition available.

Name:	bbcn_ShareBasedCompensationArrangementsFutureExpense
Namespace Prefix:	bbcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Share-based Compensation Arrangment, Future Expense, Next Twelve Months

No definition available.

Name:	bbcn_ShareBasedCompensationArrangmentFutureExpenseNextTwelveMonths
Namespace Prefix:	bbcn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	us-gaap_ShareBasedCompensationAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration