Commitments and Contingencies (Narrative) (Details) (USD $)	1 Months Ended		12 Months Ended
	Apr. 30, 2010 instance_of_noncompliance	Jan. 31, 2008	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments and Contingencies Disclosure [Abstract]
Deferred rent			$ 3,400,000	$ 2,200,000
Total rent expense			19,300,000	17,700,000	18,200,000
Exposure to earthquake loss			60,400,000
Number of instances of non-compliance issued from regulatory body	35
Settlement of fine and penalty levied by California DOI		$ 300,000