Annual report pursuant to Section 13 and 15(d)

Condensed Parent Company Financial Information (Details 1)

v2.4.1.9
Condensed Parent Company Financial Information (Details 1) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Condensed Income Statements, Captions [Line Items]                      
Revenue $ 56,518us-gaap_Revenues $ 54,417us-gaap_Revenues $ 56,909us-gaap_Revenues $ 65,583us-gaap_Revenues $ 61,028us-gaap_Revenues $ 20,609us-gaap_Revenues $ 21,362us-gaap_Revenues $ 19,669us-gaap_Revenues $ 233,427,011us-gaap_Revenues $ 122,667,769us-gaap_Revenues $ 67,461,468us-gaap_Revenues
Cost of revenues                 155,840,823us-gaap_CostOfRevenue 74,983,290us-gaap_CostOfRevenue 41,570,472us-gaap_CostOfRevenue
Operating expenses:                      
General and administrative                 4,537,351us-gaap_GeneralAndAdministrativeExpense 3,191,637us-gaap_GeneralAndAdministrativeExpense 463,501us-gaap_GeneralAndAdministrativeExpense
Total operating expenses                 7,210,564us-gaap_OperatingExpenses 4,809,915us-gaap_OperatingExpenses 1,111,351us-gaap_OperatingExpenses
Income from operations                 70,375,624us-gaap_OperatingIncomeLoss 42,874,564us-gaap_OperatingIncomeLoss 24,779,645us-gaap_OperatingIncomeLoss
Other income (expense)                 15,385,081us-gaap_NonoperatingIncomeExpense 4,261,230us-gaap_NonoperatingIncomeExpense (499,377)us-gaap_NonoperatingIncomeExpense
Net income                 85,760,705us-gaap_NetIncomeLoss 99,046,456us-gaap_NetIncomeLoss 108,774,696us-gaap_NetIncomeLoss
Parent [Member]                      
Condensed Income Statements, Captions [Line Items]                      
Cost of revenues                         
Operating expenses:                      
General and administrative                 (1,899,368)us-gaap_GeneralAndAdministrativeExpense
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
(2,225,543)us-gaap_GeneralAndAdministrativeExpense
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
  
Total operating expenses                 (1,899,368)us-gaap_OperatingExpenses
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
(2,225,543)us-gaap_OperatingExpenses
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
  
Income from operations                 (1,899,368)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
(2,225,543)us-gaap_OperatingIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
  
Other income (expense)                 82,855us-gaap_NonoperatingIncomeExpense
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
117us-gaap_NonoperatingIncomeExpense
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
  
Loss attributable to parent only                 (1,816,513)us-gaap_IncomeLossAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
(2,225,426)us-gaap_IncomeLossAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
  
Equity income earnings of VIEs                 87,577,218us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
101,271,882us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
108,774,696us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
Net income                 $ 85,760,705us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
$ 99,046,456us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember
$ 108,774,696us-gaap_NetIncomeLoss
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_ParentMember