Stock-Based Compensation - Stock Option Activity (Details) - Stock Options	6 Months Ended
	Jun. 30, 2017 $ / shares shares
Stock Options [Roll Forward]
Beginning, outstanding (in shares) | shares	286,707
Granted (in shares) | shares	0
Exercised (in shares) | shares	0
Canceled (in shares) | shares	(21,725)
Forfeited (in shares) | shares	(6,602)
Ending, outstanding (in shares) | shares	258,380
Exercisable (in shares) | shares	223,638
Weighted Average Exercise Price [Roll Forward]
Beginning, outstanding (in dollars per share) | $ / shares	$ 77.50
Granted (in dollars per share) | $ / shares	0.00
Exercised (in dollars per share) | $ / shares	0.00
Canceled (in dollars per share) | $ / shares	149.79
Forfeited (in dollars per share) | $ / shares	23.46
Ending, outstanding (in dollars per share) | $ / shares	72.81
Exercisable (in dollars per share) | $ / shares	$ 81.94