Share-Based Awards - Stock Option Activity (Details) - 1999 Plan $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) $ / shares shares
Number of Options
Outstanding, beginning balance (in shares) | shares	495,781
Exercised (in shares) | shares	(22,000)
Tendered (in shares) | shares	(426,331)
Forfeited (in shares) | shares	(2,000)
Outstanding, ending balance (in shares) | shares	45,450
Exercisable (in shares) | shares	45,450
Weighted average exercise price
Outstanding, beginning balance (in dollars per share) | $ / shares	$ 3.52
Exercised (in dollars per share) | $ / shares	3.32
Tendered (in dollars per share) | $ / shares	3.52
Forfeited (in dollars per share) | $ / shares	3.16
Outstanding, ending balance (in dollars per share) | $ / shares	3.64
Exercisable (in dollars per share) | $ / shares	$ 3.64
Outstanding, Weighted average remaining contractual life	2 years 1 month 6 days
Exercisable, Weighted average remaining contractual life	2 years 1 month 6 days
Outstanding, Aggregate intrinsic value | $	$ 1,454
Exercisable, Aggregate intrinsic value | $	$ 1,454