Equity (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended			6 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2013
Equity [Line Items]
Dividends Payable, Date Declared		Aug. 08, 2013
Common Stock, Dividends, Per Share, Declared		$ 0.20
Dividends Payable, Date to be Paid	Aug. 30, 2013
Warrants exercised during period				762,807
EQUITY (Textual) [Abstract]
Common stock shares issued		42,525,090		42,525,090
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number		540,000		540,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Potenialy Vested		141,000		141,000
Deferred Compensation Liability, Classified, Noncurrent		$ 39		$ 39
Number of Class A shares equal to unvested dividend rights		717		717
Vested common stock				105,738
Shares of vested stock awards sold back to satisfy tax obligations				8,591
Par value per share		$ 0.01		$ 0.01
Warrants issued		1,370,833		1,370,833
Price of purchase of one share of common stock against warrant		25		25
Income tax expense, related to change in benefit plans				$ 31
Share Price		$ 53.86		$ 53.86
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period				201,451
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value				$ 52.78
Common Stock, Dividends, Per Share, Cash Paid		$ 0.19
Dividends Payable, Date of Record	Aug. 19, 2013		May 20, 2013
Warrants Issued On Emergence Date [Member]
EQUITY (Textual) [Abstract]
Warrants issued		1,634,210		1,634,210
Warrants Subsequently Issued In Settlement Of Pre-Petition Claims [Member]
EQUITY (Textual) [Abstract]
Warrants issued		237,897		237,897
Class of Warrant or Right, To Be Issued		544,737		544,737
Class A [Member]
EQUITY (Textual) [Abstract]
Common stock shares authorized		90,000,000		90,000,000
Par value per share		$ 0.01		$ 0.01
Class B [Member]
EQUITY (Textual) [Abstract]
Common stock shares authorized		10,000,000		10,000,000
Par value per share		$ 0.01		$ 0.01
Shares Issued On Emergence Date [Member]
EQUITY (Textual) [Abstract]
Common stock shares issued		40,882,496		40,882,496
Shares Subsequently Issued In Settlement Of Pre-Petition Claims [Member]
EQUITY (Textual) [Abstract]
Common stock shares issued		226,016		226,016
Shares To Be Issued To Settle Prepetition Claims		517,500		517,500
Warrant [Member]
Equity [Line Items]
Stock Issued During Period, Shares, Conversion of Convertible Securities				420,067
Semcrude Pipeline [Member]
Equity [Line Items]
Equity Method Investment, Ownership Percentage		33.00%		33.00%
Employee Stock [Member]
EQUITY (Textual) [Abstract]
Compensation and Employee Benefit Plans [Text Block]		12,500		12,500
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date		85.00%
Common Stock, Capital Shares Reserved for Future Issuance		1,000,000		1,000,000