Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2017 Scenario, Forecast [Member]	Dec. 31, 2016 Scenario, Forecast [Member]	Dec. 31, 2015 Scenario, Forecast [Member]	Dec. 31, 2014 Scenario, Forecast [Member]	Dec. 31, 2013 Scenario, Forecast [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 3,182	$ 3,557	$ 7,000	$ 8,400	$ 10,000	$ 11,400	$ 12,800