Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Tax Contingency [Line Items]
Effective tax rate			27.80%	52.70%	32.80%
Income taxes	$ 11,557	$ 23,218	$ 20,375	$ 27,417
2013 U.S Court Decision [Member]
Income Tax Contingency [Line Items]
Effective tax rate					17.50%
Income taxes					$ 16,428