Warrants (Details) (Warrant [Member]) In Thousands, unless otherwise specified	Dec. 31, 2013
Class of Warrant or Right [Line Items]
Warrants outstanding	1,288
Common Stock [Member] | Raising Capital [Member] | November 2007 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	24
Weighted average exercise price	12.38
Common Stock [Member] | Issuance of Debt [Member] | Various 2009 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	295
Weighted average exercise price	16.26
Common Stock [Member] | Issuance of Debt [Member] | Various 2010 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	394
Weighted average exercise price	13.25
Common Stock [Member] | Issuance of Debt [Member] | May 2011 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	48
Weighted average exercise price	16.26
Common Stock [Member] | Issuance of Debt [Member] | August 2011 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	32
Weighted average exercise price	13.25
Common Stock [Member] | Issuance of Debt [Member] | September 2011 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	56
Weighted average exercise price	15.00
Common Stock [Member] | Issuance of Debt [Member] | Various 2012 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	326
Weighted average exercise price	15.00
Common Stock [Member] | Issuance of Debt [Member] | Various 2013 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	86
Weighted average exercise price	13.92
Common Stock [Member] | Referral Fee Program [Member] | September 2013 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	7
Weighted average exercise price	13.25
Common Stock [Member] | Mortgage Renewal [Member] | August 2011 [Member]
Class of Warrant or Right [Line Items]
Warrants outstanding	20
Weighted average exercise price	15.00