Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%
Effective income tax rate	29.00%	30.00%
Unrecognized tax benefits	$ 4.7
Decrease in income tax expenses unrecognized tax benefits if recognized	4.7
Decrease In Income Tax Expenses Unrecognized Tax Benefits If Recognized Net Of Federal Tax	3.2
Unrecognized Foreign Tax Benefits That May Be Recognized	$ 0.4
Estimated Time Period For Recognition Of Unrecognized Taxes	Within the next 12 months