Income Taxes (Tables)

12 Months Ended

Dec. 31, 2015

Income Taxes [Abstract]

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

The components of income tax expense for continuing operations for the years ended December 31, 2015, 2014, and 2013 are as follows:

	Year Ended December 31,
	2015			2014		2013
	(In thousands)
Current expense:
Federal	$	25,631		$	20,557	$	17,758
State	9,183			7,254		6,622
Total current expense	34,814			27,811		24,380
Deferred expense/(benefit):
Federal	(3,185		)	3,895		6,153
State	(1,237		)	659		2,430
Total deferred expense/(benefit)	(4,422		)	4,554		8,583
Income tax expense	$	30,392		$	32,365	$	32,963

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

Reconciliations between the Federal statutory income tax rate of 35% to the effective income tax rate for the years ended December 31, 2015, 2014, and 2013 are as follows:

	Year Ended December 31,
	2015		2014		2013
Statutory Federal income tax rate	35.0	%	35.0	%	35.0	%
Increase/ (decrease) resulting from:
Tax exempt interest, net	(7.1	)%	(5.6	)%	(5.0	)%
State and local income tax, net of Federal tax benefit	5.5	%	5.2	%	5.9	%
Tax credits	(1.9	)%	(1.7	)%	(1.3	)%
Noncontrolling interests	(1.6	)%	(1.7	)%	(1.4	)%
Out-of-period adjustment	1.3	%	—	%	—	%
Other, net	1.4	%	1.2	%	(0.1	)%
Effective income tax rate	32.6	%	32.4	%	33.1	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

The components of gross deferred tax assets and gross deferred tax liabilities at December 31, 2015 and 2014 are as follows:

	December 31,
	2015		2014
	(In thousands)
Gross deferred tax assets:
Allowance for loan losses	$	37,401	$	32,024
Allowance for losses on OREO	912		875
Stock compensation	7,391		7,709
Deferred and accrued compensation	19,370		17,438
State loss carryforward, net of federal	60		103
Capital loss carryforward	458		469
Mark to market on securities available for sale	274		414
Contingent payments	1,978		1,765
Unrealized loss on investments	748		165
Fixed assets	—		688
Other	1,589		1,149
Gross deferred tax assets	70,181		62,799
Less: valuation allowance	458		298
Total deferred tax assets	69,723		62,501
Gross deferred tax liabilities:
Cancellation of debt income deferral	4,035		5,572
Goodwill and acquired intangible assets	11,894		7,989
Fixed assets	62		—
Other	2,033		1,364
Total gross deferred tax liabilities	18,024		14,925
Net deferred tax asset	$	51,699	$	47,576

Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]

A reconciliation of the beginning and ending gross amount of unrecognized tax benefits under the provisions of ASC 740-10 is as follows:

	2015			2014			2013
	(In thousands)
Balance at January 1	$	1,067		$	549		$	4,802
Additions based on tax positions related to the current year	163			245			143
Additions based on tax positions taken in prior years	—			366			1,493
Decreases based on tax positions taken in prior years	—			—			(4,332		)
Decreases based on settlements with taxing authorities	—			—			(1,493		)
Decreases based on the expiration of statute of limitations	(208		)	(93		)	(64		)
Balance at December 31	$	1,022		$	1,067		$	549