Share-Based Compensation (Details 2) (Stock Options, USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Options
Stock options outstanding
Balance at the beginning of the period (in shares)	6,371
Exercised (in shares)	(6,371)
Balance at the end of the period (in shares)		6,371
Stock options, weighted average exercise price
Balance at the beginning of the period (in dollars per share)	$ 21.09
Exercised (in dollars per share)	$ 21.09
Balance at the end of the period (in dollars per share)		$ 21.09
Stock options, Weighted average remaining contractual term
Balance at the beginning of the period		6 months
Balance at the end of the period		6 months
Total intrinsic value of options exercised	$ 139	$ 72	$ 1,400
Related income tax benefit recognized	$ 51	$ 26	$ 500