Income Taxes (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Unrecognized tax benefits, excluding interest and penalties
Balance as of the beginning of the year	$ 0	$ 0	$ 38
Additions based on tax positions related to the current year	641	0	0
Settlements in tax positions for prior years	0	0	(38)
Balance as of the end of the year	$ 641	$ 0	$ 0