Stockholders' Equity (Details)	12 Months Ended
	Dec. 31, 2012
Vesting Schedule A [Member]
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage	25.00%
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage One	50.00%
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage Two	75.00%
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage Three	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	12 months
Share Based Compensation Arrangement By Share Based Payment Award Vesting Period One	24 months
Share Based Compensation Arrangement By Share Based Payment Award Vesting Period Two	36 months
Share Based Compensation Arrangement By Share Based Payment Award Vesting Period Three	48 months
Vesting Schedule B [Member]
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage	33.00%
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage One	67.00%
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage Two	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	24 months
Share Based Compensation Arrangement By Share Based Payment Award Vesting Period One	36 months
Share Based Compensation Arrangement By Share Based Payment Award Vesting Period Two	48 months
Vesting Schedule C [Member]
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage	50.00%
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage One	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	48 months
Share Based Compensation Arrangement By Share Based Payment Award Vesting Period One	57 months
Vesting Schedule D [Member]
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage	20.00%
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage One	40.00%
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage Two	60.00%
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage Three	80.00%
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage Four	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	6 months
Share Based Compensation Arrangement By Share Based Payment Award Vesting Period One	18 months
Share Based Compensation Arrangement By Share Based Payment Award Vesting Period Two	30 months
Share Based Compensation Arrangement By Share Based Payment Award Vesting Period Three	42 months
Share Based Compensation Arrangement By Share Based Payment Award Vesting Period Four	54 months