Employee Benefits (Details)	3 Months Ended
Mar. 31, 2015
Employee Benefits
Deferred compensation plan, matching percentage	15.00%
Deferred compensation plan, vesting period	4 years

Percentage employer matches of the employee's percentage contribution matched.

No definition available.

Name:	us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration