Condensed Consolidating Financial Statement Information (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2010
Assets        
Cash and cash equivalents $ 78,003 $ 56,213 $ 61,285 $ 115,630
Accounts receivable, net of allowance for doubtful accounts 66,353 60,543    
Deferred income taxes 25,131 24,690    
Prepaid expenses and other current assets 1,986 2,535    
Total current assets 171,473 143,981    
Furniture, fixtures and equipment, net of accumulated depreciation 9,622 9,065    
Intangible assets, net of accumulated amortization 384,066 378,240    
Goodwill 598,181 595,522    
Other assets 11,712 10,604    
Intercompany          
Investment in subsidiary          
Total assets 1,175,054 1,137,412    
Liabilities        
Accounts payable 10,402 9,564    
Accrued expenses 29,461 26,288    
Deferred revenue and customer deposits 3,499 5,891    
Accrued interest 10,588 10,588    
Other current liabilities 6,248 3,969    
Total current liabilities 60,198 56,300    
Deferred income taxes, net 82,670 82,670    
Senior secured notes, net of unamortized discount 193,773 193,613    
Other liabilities 18,958 16,367    
Total liabilities 355,599 348,950    
Stockholders' equity        
Total stockholders' equity 819,455 788,462    
Total liabilities and stockholders' equity 1,175,054 1,137,412    
Bankrate [Member]
        
Assets        
Cash and cash equivalents 72,437 44,476 55,615 109,323
Accounts receivable, net of allowance for doubtful accounts 33,641 32,705    
Deferred income taxes 18,696 18,251    
Prepaid expenses and other current assets 1,053 1,718    
Total current assets 125,827 97,150    
Furniture, fixtures and equipment, net of accumulated depreciation 5,091 5,320    
Intangible assets, net of accumulated amortization 256,514 242,336    
Goodwill 383,596 380,937    
Other assets 2,313 2,045    
Intercompany (179,149) (168,537)    
Investment in subsidiary 351,363 349,401    
Total assets 945,555 908,652    
Liabilities        
Accounts payable 6,146 6,916    
Accrued expenses 25,931 22,169    
Deferred revenue and customer deposits 2,638 4,601    
Accrued interest          
Other current liabilities 6,237 3,946    
Total current liabilities 40,952 37,632    
Deferred income taxes, net 66,221 66,230    
Senior secured notes, net of unamortized discount          
Other liabilities 18,927 16,328    
Total liabilities 126,100 120,190    
Stockholders' equity        
Total stockholders' equity 819,455 788,462    
Total liabilities and stockholders' equity 945,555 908,652    
Guarantor Subsidiary [Member]
        
Assets        
Cash and cash equivalents 3,963 10,066 4,272 5,014
Accounts receivable, net of allowance for doubtful accounts 30,603 26,809    
Deferred income taxes 6,422 6,422    
Prepaid expenses and other current assets 849 750    
Total current assets 41,837 44,047    
Furniture, fixtures and equipment, net of accumulated depreciation 4,043 3,307    
Intangible assets, net of accumulated amortization 123,370 131,525    
Goodwill 214,585 214,585    
Other assets 9,399 8,559    
Intercompany 188,117 176,718    
Investment in subsidiary (2,078) (1,524)    
Total assets 579,273 577,217    
Liabilities        
Accounts payable 3,895 3,144    
Accrued expenses 3,120 3,872    
Deferred revenue and customer deposits 782 1,133    
Accrued interest 10,588 10,588    
Other current liabilities          
Total current liabilities 18,385 18,737    
Deferred income taxes, net 15,176 15,176    
Senior secured notes, net of unamortized discount 193,773 193,613    
Other liabilities 31 39    
Total liabilities 227,365 227,565    
Stockholders' equity        
Total stockholders' equity 351,908 349,652    
Total liabilities and stockholders' equity 579,273 577,217    
Non-Guarantor Subsidiary [Member]
        
Assets        
Cash and cash equivalents 1,603 1,671 1,398 1,293
Accounts receivable, net of allowance for doubtful accounts 2,109 1,578    
Deferred income taxes 13 17    
Prepaid expenses and other current assets 84 67    
Total current assets 3,809 3,333    
Furniture, fixtures and equipment, net of accumulated depreciation 488 438    
Intangible assets, net of accumulated amortization 4,182 4,379    
Goodwill          
Other assets          
Intercompany (8,968) (8,181)    
Investment in subsidiary          
Total assets (489) (31)    
Liabilities        
Accounts payable 361 53    
Accrued expenses 410 247    
Deferred revenue and customer deposits 79 157    
Accrued interest          
Other current liabilities 11 23    
Total current liabilities 861 480    
Deferred income taxes, net 1,273 1,264    
Senior secured notes, net of unamortized discount          
Other liabilities          
Total liabilities 2,134 1,744    
Stockholders' equity        
Total stockholders' equity (2,623) (1,775)    
Total liabilities and stockholders' equity (489) (31)    
Eliminations [Member]
        
Assets        
Cash and cash equivalents          
Accounts receivable, net of allowance for doubtful accounts    (549)    
Deferred income taxes          
Prepaid expenses and other current assets          
Total current assets    (549)    
Furniture, fixtures and equipment, net of accumulated depreciation          
Intangible assets, net of accumulated amortization          
Goodwill          
Other assets         
Intercompany          
Investment in subsidiary (349,285) (347,877)    
Total assets (349,285) (348,426)    
Liabilities        
Accounts payable    (549)    
Accrued expenses          
Deferred revenue and customer deposits          
Accrued interest          
Other current liabilities          
Total current liabilities    (549)    
Deferred income taxes, net          
Senior secured notes, net of unamortized discount          
Other liabilities          
Total liabilities    (549)    
Stockholders' equity        
Total stockholders' equity (349,285) (347,877)    
Total liabilities and stockholders' equity $ (349,285) $ (348,426)