Equity (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 plan	Dec. 31, 2012	Dec. 31, 2011
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Number of share-based compensation plans	3
Outstanding assumed options (in shares)	375,000
Additional shares authorized by Board of Directors (in shares)	6,000,000
Shares authorized (in shares)	22,500,000
Intrinsic value of options exercised	$ 8,864,115	$ 718,978	$ 258,000
Intrinsic value of options vested	3,351,000	1,851,000	1,194,000
Total unrecognized compensation expense	$ 12,052,935
Weighted-average grant date fair value for options granted during the period (in dollars per share)	$ 3.08	$ 1.07	$ 0.63