Amount of cash paid to acquire the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph f(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_BusinessAcquisitionCostOfAcquiredEntityCashPaid
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Business Acquisitions and Asset Purchases (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Feb. 12, 2010 HotAir.com	Jun. 08, 2010 GodTube.com	Aug. 03, 2010 WWRC-AM	Sep. 01, 2010 Samaritan Fundraising	Dec. 31, 2010 Purchase of various Internet domain names	Oct. 31, 2012 Godvine.com	Oct. 02, 2012 Godvine.com	Aug. 31, 2012 WLCC-AM,Tampa	Aug. 30, 2012 SermonSpice.com	May 15, 2012 Churchangel.com & rchurch.com	Apr. 10, 2012 WKDL-AM	Jan. 13, 2012 KTNO-AM	Dec. 31, 2011 KTEK-AM	Dec. 21, 2011 KTEK-AM	Mar. 28, 2011 WorshipHouse Media	Mar. 14, 2011 WBZS-AM
Business Acquisition [Line Items]
Business acquisition, total cost	$ 10,695,000	$ 9,151,000		$ 2,000,000	$ 2,500,000	$ 3,090,000	$ 800,000	$ 170,000	$ 4,200,000	$ 4,200,000	$ 1,150,000	$ 3,000,000	$ 165,000	$ 30,000	$ 2,150,000	$ 2,601,000	$ 2,601,000	$ 6,000,000	$ 550,000
Acquisition agreement			$ 8,560,000