XML 64 R52.htm IDEA: XBRL DOCUMENT v3.3.1.900
Stockholders' Equity (Detail Textuals)
 3 Months Ended 12 Months Ended
Aug. 02, 2010
Director
Dec. 31, 2015
Quarter
$ / shares
shares
Sep. 30, 2015
$ / shares
Jun. 30, 2015
$ / shares
Mar. 31, 2015
$ / shares
Sep. 30, 2014
$ / shares
Jun. 30, 2014
$ / shares
Mar. 31, 2014
$ / shares
Dec. 31, 2013
$ / shares
Dec. 31, 2015
USD ($)
Conversion_rate
Quarter
Director
$ / shares
shares
Dec. 31, 2014
USD ($)
$ / shares
shares
Stockholders' equity                      
Preferred stock, shares issued | shares   335,273               335,273 335,273
Preferred stock, shares outstanding | shares   335,273               335,273 335,273
Preferred stock, par value (in dollars per share)   $ 0.001               $ 0.001 $ 0.001
Redemption price per share (in dollars per share)   $ 10               $ 10  
Dividend rate (as a percent)                   6.00%  
Deemed dividends recorded | $                  
Preferred stock                      
Stockholders' equity                      
Preferred stock, shares issued | shares   335,273               335,273  
Preferred stock, shares outstanding | shares   335,273               335,273  
Preferred stock, par value (in dollars per share)   $ 10               $ 10  
Liquidation preference (in dollars per share)   $ 10               $ 10  
Number of shares to be issued for each preferred stock upon conversion | Conversion_rate                   0.06079  
Conversion price (in dollars per share)                   $ 164.50  
Shares reserved for future issuance upon conversion | shares   20,381               20,381  
Number of trading days during which the closing price of the entity's common stock must exceed the conversion price for at least 20 days in order for the preferred stock to be convertible                   30 days  
Number of trading days prior to notice of automatic conversion                   5 days  
Number of quarters in which no preferred stock dividends have been paid | Quarter   6               6  
Number of Board of Directors to be elected by Preferred Stock holders if entity fails to pay dividends on Preferred Stock | Director                   2  
Number of Board of Directors elected by the Preferred Stock holders when the entity failed to pay dividends on Preferred Stock | Director 2                    
Interest rate (as a percent)   6.00%               6.00%  
Debt principal amount per share, basis for exchange (in dollars per share)                   $ 10  
Debt instrument, term                   25 years  
Dividend declared, date   Dec. 24, 2015 Oct. 14, 2015 May 22, 2015 Feb. 18, 2015            
Declared dividend per share   $ 0.15 $ 0.15 $ 0.15 $ 0.15 $ 0.15 $ 0.15 $ 0.15 $ 0.15 $ 0.15  
Dividend paid, date   Feb. 01, 2016 Nov. 02, 2015 Aug. 01, 2015 May 01, 2015 Nov. 03, 2014 Aug. 01, 2014 May 01, 2014 Feb. 01, 2014    
Dividend, record date   Jan. 21, 2016 Oct. 23, 2015 Jul. 17, 2015 Apr. 17, 2015            
Preferred stock | Minimum                      
Stockholders' equity                      
Closing price of stock (in dollars per share)   $ 246.75               $ 246.75  
Percentage of the closing sales price of the entity's common stock that the conversion price must exceed in order for the preferred stock to be convertible                   150.00%  
Number of trading days within 30 trading days in which the closing price of the entity's common stock must exceed the conversion price for the preferred stock to be convertible                   20 days