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Fair Value (Tables)
 3 Months Ended
Mar. 31, 2014
Fair Value Disclosures [Abstract]  
Fair Value Of The Availabe-For-Sale Equity Securities Recognized In The Balance Sheet On A Recurring Basis
The following table presents the fair value of the Company's available-for-sale equity securities recognized in the accompanying balance sheets measured at fair value on a recurring basis and the level within the fair value hierarchy in which the fair value measurements fall at March 31, 2014 and December 31, 2013:
 
 
 
 
Fair Value Measurements Using:
 
 
 
 
Quoted Prices in Active Markets for Identical Assets
(Level 1)
 
Significant Other Observable Inputs
(Level 2)
 
Significant Unobservable Inputs
(Level 3)
March 31, 2014:
 
 
 
 
 
Assets: 
 
Fair Value
 
 
 
Available-for-sale equity securities
 
 
 
 
 
 
 
 
Cement industry
 
$
15,478,455

 
$
15,478,455

 
$
—

 
$
—

General building materials industry
 
7,342,061

 
7,342,061

 
—

 
—

Oil and gas refining and marketing industry
 
4,305,275

 
4,305,275

 
—

 
—

Residential construction industry
 
1,030,503

 
1,030,503

 
—

 
—

Total assets measured at fair value
 
$
28,156,294

 
$
28,156,294

 
$
—

 
$
—

 
 
 
 
 
 
 
 
 
December 31, 2013:
 
 
 
 
 
 
 
 
Assets:                
 
 
 
 
 
 
 
 
Available-for-sale equity securities
 
 
 
 
 
 
 
 
Cement industry
 
$
12,671,592

 
$
12,671,592

 
$
—

 
$
—

General building materials industry
 
6,565,316

 
6,565,316

 
—

 
—

Oil and gas refining and marketing industry
 
4,425,517

 
4,425,517

 
—

 
—

Residential construction industry
 
1,093,869

 
1,093,869

 
—

 
—

Total assets measured at fair value
 
$
24,756,294

 
$
24,756,294

 
$
—

 
$
—
Schedule Of Unrealized Losses From Investments
The following table shows the unrealized losses and fair value of the Company's investments with unrealized losses that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual trade lots of securities have been in a continuous unrealized loss position at March 31, 2014 and December 31, 2013:
Available-for-sale equity securities
 
Less than 12 Months
 
12 Months or Greater
 
Total
March 31, 2014
 
Fair Value
 
Unrealized Losses
 
Fair Value
 
Unrealized Losses
 
Fair Value
 
Unrealized Losses
Residential construction industry
 
$
569,943

 
$
(40,415
)
 
$
95,950

 
$
(6,845
)
 
$
665,893

 
$
(47,260
)
Total
 
$
569,943

 
$
(40,415
)
 
$
95,950

 
$
(6,845
)
 
$
665,893

 
$
(47,260
)
 
December 31, 2013
 
 
 
 
 
 
 
 
 
 
 
 
Residential construction industry
 
$
283,143

 
$
20,267

 
$
—

 
$
—

 
$
283,143

 
$
20,267

Total
 
$
283,143

 
$
20,267

 
$
—

 
$
—

 
$
283,143

 
$
20,267