Regulatory Matters (Details) (USD $)	3 Months Ended
	Mar. 31, 2014		Dec. 31, 2013		Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2014 Consolidated [Member]	Dec. 31, 2013 Consolidated [Member]	Mar. 31, 2014 Independent Bank [Member]	Dec. 31, 2013 Independent Bank [Member]	Apr. 09, 2014 Subsequent Event [Member]
Regulatory Matters [Abstract]
Undivided profits	$ 46,600,000
Maximum percentage of allowance for loan losses and allowance for unfunded lending commitments (in hundredths)	1.25%
Subsequent Event [Line Items]
Request for approval to transfer capital from bank to parent entity	15,000,000
Transfer of capital from bank to the parent company											15,000,000
Total capital to risk-weighted assets [Abstract]
Total risk-based capital							251,431,000	245,284,000	240,390,000	234,078,000
Minimum for Adequately Capitalized Institutions, Amount							112,869,000	113,086,000	112,792,000	113,013,000
Minimum for Well Capitalized Institutions, Amount									140,990,000	141,267,000
Actual, Ratio (in hundredths)							17.82%	17.35%	17.05%	16.57%
Minimum for Adequately Capitalized Institutions, Ratio (in hundredths)							8.00%	8.00%	8.00%	8.00%
Minimum for Well-Capitalized Institutions, Ratio (in hundredths)									10.00%	10.00%
Tier 1 capital to risk-weighted assets [Abstract]
Actual, Amount							233,544,000	227,338,000	222,517,000	216,146,000
Minimum for Adequately Capitalized Institutions, Amount							56,434,000	56,543,000	56,396,000	56,507,000
Minimum for Well-Capitalized Institutions, Amount									84,594,000	84,760,000
Actual, Ratio (in hundredths)							16.55%	16.08%	15.78%	15.30%
Minimum for Adequately Capitalized Institutions, Ratio (in hundredths)							4.00%	4.00%	4.00%	4.00%
Minimum for Well Capitalized Institutions, Ratio (in hundredths)									6.00%	6.00%
Tier 1 capital to average assets [Abstract]
Tier 1 capital							233,544,000	227,338,000	222,517,000	216,146,000
Minimum for Adequately Capitalized Institutions, Amount							87,031,000	85,729,000	86,988,000	85,681,000
Minimum for Well-Capitalized Institutions, Amount									108,735,000	107,101,000
Actual, Ratio (in hundredths)							10.73%	10.61%	10.23%	10.09%
Minimum for Adequately Capitalized Institutions, Ratio (in hundredths)							4.00%	4.00%	4.00%	4.00%
Minimum for Well-Capitalized Institutions, Ratio (in hundredths)									5.00%	5.00%
Components of regulatory capital [Abstract]
Total shareholders' equity	236,586,000		231,581,000		144,085,000	134,975,000	236,586,000	231,581,000	255,333,000	250,306,000
Add (deduct) [Abstract]
Qualifying trust preferred securities							39,500,000	39,500,000	0	0
Accumulated other comprehensive loss	(7,644,000)	[1]	(9,245,000)	[1]	(6,953,000)	(8,058,000)	7,644,000	9,245,000	7,644,000	9,245,000
Intangible assets	(3,029,000)		(3,163,000)				(3,029,000)	(3,163,000)	(3,029,000)	(3,163,000)
Disallowed deferred tax assets							(46,760,000)	(49,609,000)	(37,034,000)	(40,026,000)
Disallowed capitalized mortgage loan servicing rights							(397,000)	(216,000)	(397,000)	(216,000)
Tier 1 capital							233,544,000	227,338,000	222,517,000	216,146,000
Qualifying trust preferred securities							0	0	0	0
Allowance for loan losses and allowance for unfunded lending commitments limited to 1.25% of total risk-weighted assets							17,887,000	17,946,000	17,873,000	17,932,000
Total risk-based capital							$ 251,431,000	$ 245,284,000	$ 240,390,000	$ 234,078,000

[1] 2014 amounts are presented net of tax as we removed substantially all of the valuation allowance on our deferred tax assets during the second quarter of 2013 (see Note #10).