Share-Based Compensation (Summary of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Each Anniversary of Commencement Date for first 4 years [Member]
Shares:
Beginning balance (in shares)	21,830
Granted (in shares)	6,271
Exercised (in shares)	(50)
Forfeited (in shares)	(200)
Ending balance (in shares)	27,851
Exercisable (in shares)	4,441
Expected to vest (in shares)	27,344
Weighted Average Exercise Price (in dollars per share):
Beginning balance, weighted average exercise price (in dollars per share)	$ 1.00
Granted, weighted average exercise price (in dollars per share)	$ 1.40
Exercised, weighted average exercise price (in dollars per share)	$ 1.00
Forfeited, weighted average exercise price (in dollars per share)	$ 1.00
Ending balance, weighted average exercise price (in dollars per share)	$ 1.09
Exercisable, weighted average exercise price (in dollars per share)	$ 1.01
Expected to vest, weighted average exercise price (in dollars per share)	$ 1.09
Weighted average remaining life, outstanding	8 years 8 months
Weighted average remaining life, exercisable	8 years 5 months
Weighted average remaining life, expected to vest	8 years 8 months
Aggregate intrinsic value, ending balance	$ 8,632
Aggregate intrinsic value, exercisable	1,726
Aggregate intrinsic value, vested and expected to vest	8,429
Annually over years 2014 through 2017 [Member]
Shares:
Beginning balance (in shares)	21,330
Granted (in shares)	5,771
Exercised (in shares)	(50)
Forfeited (in shares)	(200)
Ending balance (in shares)	26,851
Exercisable (in shares)	4,216
Expected to vest (in shares)	26,145
Weighted Average Exercise Price (in dollars per share):
Beginning balance, weighted average exercise price (in dollars per share)	$ 1.00
Granted, weighted average exercise price (in dollars per share)	$ 1.40
Exercised, weighted average exercise price (in dollars per share)	$ 1.00
Forfeited, weighted average exercise price (in dollars per share)	$ 1.00
Ending balance, weighted average exercise price (in dollars per share)	$ 1.09
Exercisable, weighted average exercise price (in dollars per share)	$ 1.00
Expected to vest, weighted average exercise price (in dollars per share)	$ 1.09
Weighted average remaining life, outstanding	8 years 8 months
Weighted average remaining life, exercisable	8 years 3 months
Weighted average remaining life, expected to vest	8 years 8 months
Aggregate intrinsic value, ending balance	8,432
Aggregate intrinsic value, exercisable	1,686
Aggregate intrinsic value, vested and expected to vest	8,234
Rollover Stock Options [Member]
Shares:
Beginning balance (in shares)	17,351
Granted (in shares)	0
Exercised (in shares)	(202)
Forfeited (in shares)	0
Ending balance (in shares)	17,149
Exercisable (in shares)	17,149
Weighted Average Exercise Price (in dollars per share):
Beginning balance, weighted average exercise price (in dollars per share)	$ 0.25
Granted, weighted average exercise price (in dollars per share)	$ 0.25
Exercised, weighted average exercise price (in dollars per share)	$ 0.25
Forfeited, weighted average exercise price (in dollars per share)	$ 0.25
Ending balance, weighted average exercise price (in dollars per share)	$ 0.25
Exercisable, weighted average exercise price (in dollars per share)	$ 0.25
Weighted average remaining life, outstanding	5 years 11 months 6 days
Weighted average remaining life, exercisable	5 years 11 months 6 days
Aggregate intrinsic value, ending balance	19,722
Aggregate intrinsic value, exercisable	$ 19,722