Other Intangible Assets (Textual) (Details) (USD $)							12 Months Ended
	Dec. 31, 2012 Core deposit intangible assets [Member]	Dec. 31, 2012 Mortgage servicing rights [Member]	Dec. 07, 2012 Independent Bank [Member]	Dec. 31, 2012 Independent Bank [Member] Core deposit intangible assets [Member]	Dec. 07, 2012 Independent Bank [Member] Core deposit intangible assets [Member]	Dec. 31, 2011 Independent Bank [Member] Core deposit intangible assets [Member]	Dec. 31, 2012 Weighted Average [Member] Mortgage servicing rights [Member]	Dec. 31, 2011 Weighted Average [Member] Mortgage servicing rights [Member]
Estimated Future Amortization Expense, Fiscal Year Maturity [Abstract]
2013	$ 1,900,000
2014	1,800,000
2015	1,700,000
2016	1,500,000
2017	1,200,000
Thereafter	3,800,000
Intangibles acquired			5,600,000	5,600,000	5,600,000	0
Coupon rate (percent)							4.57%	5.01%
Discount rate (percent)							8.50%	8.50%
Impairment valuation allowance		$ 0