XML 25 R57.htm IDEA: XBRL DOCUMENT v2.4.1.9

Salary Deferral Plan - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Salary deferral plan, discretionary and matching contribution	$ 591,000us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount	$ 524,000us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount

X

- Details

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

X

- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

+ References

No definition available.

+ Details

Name:	us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration