Derivatives (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Derivatives (Textual) [Abstract]
Interest rate caps	$ 10,109				$ 10,384				$ 10,109	$ 10,384
Fair value approximately, current earnings through other noninterest income	6,939	3,752	6,949	5,091	12,021	1,916	5,300	3,988	22,731	23,225	21,893
Interest rate caps [Member]
Derivatives (Textual) [Abstract]
Home Savings interest rate caps as of December 31, 2010	0								0
Interest rate caps [Member] | Not Designated as Hedging Instrument [Member]
Derivatives (Textual) [Abstract]
Home Savings entered into an interest rate cap agreements									Oct. 11, 2013
Interest rate caps	436				1,933				436	1,933
Fair value approximately, current earnings through other noninterest income									$ 1,497	$ 528