Net income per share other (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Anti-dilutive securities excluded from computation of diluted earnings per share
Total anti-dilutive securities (in shares)	4,960,758	11,673,467	6,637,513	12,890,660
Stock options
Anti-dilutive securities excluded from computation of diluted earnings per share
Total anti-dilutive securities (in shares)	11,071	4,762,323	592,170	5,979,516
Restricted stock
Anti-dilutive securities excluded from computation of diluted earnings per share
Total anti-dilutive securities (in shares)		60,000	30,004	60,000
Convertible preferred stock
Anti-dilutive securities excluded from computation of diluted earnings per share
Total anti-dilutive securities (in shares)	4,949,687	6,851,144	6,015,339	6,851,144