Summary of Significant Accounting Policies (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Deferred Costs
Internal sales commissions	$ 13,931,000		$ 13,171,000
Third party commissions	13,315,000		13,665,000
External legal counsel	464,000		393,000
Total	27,710,000		27,229,000
Recoverability of Long-Lived Assets
Impairment of real estate	0	0
Impairment loss related to intangible assets	0	0
Goodwill	41,191,000		41,191,000
Impairment loss related to goodwill	$ 0	$ 0