Commitments and Contingencies (Narrative) (Details)			1 Months Ended	12 Months Ended
	Mar. 02, 2015 USD ($)	Dec. 08, 2014 USD ($)	Apr. 30, 2010 instance_of_noncompliance	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Loss Contingencies [Line Items]
Deferred rent				$ 3,600,000	$ 4,400,000
Total rent expense				16,000,000	14,600,000	$ 19,300,000
Exposure to earthquake loss				$ 64,300,000
Number of instances of non-compliance issued from regulatory body | instance_of_noncompliance			35
Litigation Settlement, Expense		$ 27,593,550
Settlement of fine and penalty levied by California DOI					$ 27,593,550
California Department of Insurance [Member]
Loss Contingencies [Line Items]
Settlement of fine and penalty levied by California DOI	$ 1,000,000