Intangible Assets (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Capitalized MSRs [Roll Forward]
Balance at beginning of period			$ 11,472
Amortization			(2,935)	(2,700)
Balance at end of period	10,243	11,849	10,243	11,849
Mortgage servicing rights [Member]
Capitalized MSRs [Roll Forward]
Balance at beginning of period	3,463	3,577	3,593	3,782
Additions	503	317	1,706	1,028
Amortization	(500)	(333)	(1,833)	(1,249)
Balance at end of period	$ 3,466	$ 3,561	$ 3,466	$ 3,561