Subsequent Events (Details)			3 Months Ended								12 Months Ended
	Mar. 15, 2017 USD ($) employee	Mar. 13, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Subsequent Event [Line Items]
Pre-tax expense reduction			$ 9,850,000	$ 10,013,000	$ 10,084,000	$ 10,579,000	$ 7,463,000	$ 6,467,000	$ 6,682,000	$ 4,975,000	$ 40,526,683	$ 25,586,464	$ 15,225,337
Subsequent Event [Member]
Subsequent Event [Line Items]
Upfront payment		$ 2,000,000
Pre-tax expense reduction	$ 8,000,000
Reduction of employees | employee	30