Capital Stock (Detail Textuals) (USD $)	0 Months Ended		3 Months Ended		6 Months Ended		11 Months Ended		0 Months Ended		0 Months Ended	1 Months Ended	6 Months Ended	11 Months Ended			0 Months Ended	1 Months Ended	3 Months Ended	6 Months Ended	11 Months Ended	1 Months Ended
	Apr. 16, 2013	Mar. 13, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jul. 12, 2013	Apr. 16, 2013 Puttable Equity Linked Senior Notes due 2014 [Member]	Jul. 12, 2013 Puttable Equity Linked Senior Notes due 2014 [Member]	Apr. 16, 2013 Class A common stock [Member]	Mar. 14, 2013 Class A common stock [Member]	Jun. 30, 2014 Class A common stock [Member]	Dec. 31, 2013 Class A common stock [Member]	Jul. 12, 2013 Class A common stock [Member]	Mar. 13, 2013 Class A common stock [Member]	Mar. 15, 2013 Series A Preferred Stock [Member]	Mar. 14, 2013 Series A Preferred Stock [Member]	Jun. 30, 2013 Series A Preferred Stock [Member]	Jun. 30, 2013 Series A Preferred Stock [Member]	Dec. 31, 2013 Series A Preferred Stock [Member]	Jun. 30, 2014 BCR exchange transaction [Member]	Jun. 30, 2014 BCR exchange transaction [Member] Class A common stock [Member]
Class of Stock [Line Items]
Exchange of common units for shares, units exchanged																						673,565
Exchange of common units for shares, shares issued													673,000										673,565
Senior Notes exchanged for stock, value of senior note exchanged									$ 138,853,000
Shares of Class A common stock issued in exchange of debt											9,549,721			13,679,000
Cash payment for additional exchange consideration, accrued interest and in lieu of fractional shares	4,860,000
Aggregate principal amount of Senior Notes put to the company										60,033,000
Number of shares received by the note holder upon a put															4,128,806
Cash payments for interest payable and in lieu of fractional shares for put transaction								1,088,000
Conversion of stock, shares converted												362,990						109,768
Stock redeemed during period, Shares																	101,270				101,000
Stock redeemed during period, Value							5,063,000										5,100,000				5,063,000
Shares received upon settlement of equity call hedge																765,134
Value per share of Class A common stock received upon settlement of equity call hedge																$ 16.82
Class A common stock received upon settlement of equity call hedge																12,868,000
Proceeds from equity call hedge related to Series A preferred stock issuance		10,231,000			0	10,231,000
Preferred dividends			$ 0	$ 0	$ 0	$ 185,000	$ 185,000												$ 0	$ 185,000