Income Taxes (Unrecognized Tax Liability Rec) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 7,144	$ 6,766	$ 6,190
Additions for tax positions of current year	342	378	576
Decreases for tax positions taken during a prior period	(190)	0	0
Lapse of statute of limitations	(44)	0	0
Balance at end of year	$ 7,252	$ 7,144	$ 6,766