Total Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Total Comprehensive Income [Abstract]
Net income	$ 7,413	$ 9,830	$ 17,442	$ 19,445
Unrealized security gains/(losses) arising during the period	(659)	3,395	2,791	4,671
Reclassification adjustment for gains included in income	(528)	(3,128)	(497)	(3,128)
Net unrealized gains on securities	(1,187)	267	2,294	1,543
Unrealized loss on interest rate floors		(160)		(477)
Other comprehensive income before income taxes	(1,187)	107	2,294	1,066
Tax effect	447	(40)	(864)	(407)
Other comprehensive income	(740)	67	1,430	659
Total comprehensive income	$ 6,673	$ 9,897	$ 18,872	$ 20,104

The change in equity [net assets] of a business enterprise during a period from transactions and other events and circumstances from non-owner sources which are attributable to the reporting entity. It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, but excludes any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent.

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