Fair Value Measurement for Financial and Non-Financial Assets and Liabilities (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Servicing assets	Mar. 31, 2013 Servicing assets
Summary of changes in fair value by asset category
Balance at the beginning of the period			$ 16,108	$ 9,610
Net Realized Gains in Net Income			563	107
Net Purchases, Sales and Settlements			865	704
Balance at the end of the period			17,536	10,421
Transfer of financial assets from level 1 to level 2	0	0
Transfer of financial assets from level 2 to level 1	0	0
Transfer of financial liabilities from level 1 to level 2	0	0
Transfer of financial liabilities from level 2 to level 1	0	0
Transfer of financial assets into and out of level 3	0	0
Transfer of financial liabilities into and out of level 3	$ 0	$ 0