Consolidated Statements Of Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements Of Income [Abstract]
Interest expense, related parties interest	$ 237	$ 228

The amount of interest expense incurred during the period on a debt or other obligation to a related party.

No definition available.

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