Employee Benefit Plans - 401(K) Saving And Retirement Plan (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Benefit Plan Compensation
Compensation cost	$ 7,500	$ 3,600	$ 1,800
Non Employee Director Member
Employee Benefit Plan Compensation
Granted (in shares)	89,490	71,311	673,152
Compensation cost	$ 267	$ 331	$ 332
401(k) Savings & Retirement Plan
401(K) Savings & Retirement Plan
Percent of salary employee is permitted to contribute	100.00%
Vesting period	3 years
Common stock, shares issued	0	74,863	1,319,914
Total expense (including issuance of shares)	$ 889	$ 367	$ 371