Deposits (Details 3) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Certificates of deposit
2014, Weighted Average Rate (as a percent)	0.97%
2015, Weighted Average Rate (as a percent)	2.06%
2016, Weighted Average Rate (as a percent)	2.08%
2017, Weighted Average Rate (as a percent)	1.13%
2018, Weighted Average Rate (as a percent)	1.06%
2019 and thereafter, Weighted Average Rate (as a percent)	1.57%
Total, Weighted Average Rate (as a percent)	1.50%
2014, Balance	$ 1,476,676
2015, Balance	1,099,849
2016, Balance	462,897
2017, Balance	141,099
2018, Balance	110,552
2019 and thereafter, Balance	724
Total, Balance	$ 3,291,797	$ 3,960,371
2014 (as a percent)	44.86%
2015 (as a percent)	33.41%
2016 (as a percent)	14.06%
2017 (as a percent)	4.29%
2018 (as a percent)	3.36%
2019 and thereafter (as a percent)	0.02%
Percent of total	100.00%