Unconsolidated Joint Ventures - Income Statement (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]
Revenues	$ 30,946,840	$ 34,855,428	$ 52,446,679	$ 65,619,429
Cost of sales	24,343,988	25,721,045	40,163,141	48,258,788
Gross profit	6,602,852	9,134,383	12,283,538	17,360,641
Operating expenses	3,651,728	2,937,793	7,144,496	5,003,057
Net income of unconsolidated joint ventures	2,951,124	6,196,590	5,139,042	12,357,584
Equity in net income of unconsolidated joint ventures reflected in the accompanying consolidated statements of operations	$ 171,508	$ 380,224	$ 944,728	$ 652,080