Income Taxes (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Activity relating to the Company's unrecognized tax benefits
Balance at the beginning of the period	$ 14,678,000
Gross increases related to current period tax positions	322,000
Balance at the end of the period	15,000,000
Unrecognized tax benefits relating to state research credits	322,000
Portion of unrecognized tax benefits, if recognized would decrease the entity's tax provision and increase net income	12,300,000
Provision made for undistributed earnings of foreign subsidiaries	0
Undistributed earnings for non-U.S. subsidiaries which are deemed to be permanently reinvested	$ 22,300,000