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Other Assets (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Nonmarketable investment securities $ 2,058 $ 2,750
Accrued interest receivable 2,769 2,796
Insurance premiums receivable 719 1,089
Income taxes receivable 2,073 5,160
Deferred income taxes 20,365 9,180
Prepaid expenses 1,209 2,227
Other assets 9,090 5,634
Total $ 38,283 $ 28,836