Business Combinations - Summary of Pro Forma Information (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Business Acquisition, Pro Forma Information [Abstract]
Net interest income	$ 67,490	$ 79,266	$ 132,455	$ 140,581
Net income	$ 22,312	$ 19,394	$ 44,508	$ 36,411
Pro forma earnings per share:
Basic (dollars per share)	$ 0.28	$ 0.24	$ 0.56	$ 0.46
Diluted (dollars per share)	$ 0.28	$ 0.24	$ 0.56	$ 0.46

The pro forma net interest income for a period as if the business combination or combinations had been completed at the beginning of the period.

No definition available.

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- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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- Definition

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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