Warehouse Lines of Credit (Narrative) (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Short-term Debt [Line Items]
Amount outstanding	$ 300,092,293us-gaap_LineOfCredit	$ 236,058,976us-gaap_LineOfCredit
Warehouse Agreement Borrowings [Member]
Short-term Debt [Line Items]
Amount outstanding	89,417,564
Warehouse Agreement Borrowings [Member] \| Warehouse Line of Credit One [Member]
Short-term Debt [Line Items]
Amount of agreement	45,000,000
Expiration date	Jan. 15, 2015
Amount outstanding	21,210,431
Warehouse Agreement Borrowings [Member] \| Warehouse Line of Credit One [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Short-term Debt [Line Items]
Interest rate spread	2.30%
Warehouse Agreement Borrowings [Member] \| Warehouse Line of Credit Two [Member]
Short-term Debt [Line Items]
Amount of agreement	35,000,000
Expiration date	Sep. 28, 2015
Amount outstanding	27,499,080
Warehouse Agreement Borrowings [Member] \| Warehouse Line of Credit Two [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Short-term Debt [Line Items]
Interest rate spread	2.25%
Warehouse Agreement Borrowings [Member] \| Warehouse Line of Credit Two [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Short-term Debt [Line Items]
Interest rate spread	2.50%
Warehouse Agreement Borrowings [Member] \| Warehouse Line of Credit Three [Member]
Short-term Debt [Line Items]
Amount of agreement	30,000,000
Expiration date	Oct. 26, 2015
Amount outstanding	29,619,453
Warehouse Agreement Borrowings [Member] \| Warehouse Line of Credit Three [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Short-term Debt [Line Items]
Interest rate spread	2.25%
Warehouse Agreement Borrowings [Member] \| Warehouse Line of Credit Three [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Minimum [Member]
Short-term Debt [Line Items]
Interest rate spread	2.75%
Warehouse Agreement Borrowings [Member] \| Warehouse Line of Credit Four [Member]
Short-term Debt [Line Items]
Amount of agreement	20,000,000
Expiration date	Jun. 30, 2016
Amount outstanding	$ 11,088,600
Warehouse Agreement Borrowings [Member] \| Warehouse Line of Credit Four [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Short-term Debt [Line Items]
Interest rate spread	2.75%

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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