Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets (Details)

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Goodwill and Other Intangible Assets (Details) (USD $)
 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Dec. 31, 2013
Goodwill by business segment      
Beginning Balance $ 444,268,000    
Goodwill acquired during the period 81,273,000    
Adjustments / Reallocation of goodwill 0    
Goodwill impairment 3,000,000 0  
Ending Balance 522,541,000    
Summary of other intangible assets      
Total other intangible assets, gross carrying amount 533,142,000   512,387,000
Total other intangible assets, accumulated amortization (447,818,000)   (419,194,000)
Total other intangible assets, net of carrying value 85,324,000   93,193,000
Estimated amortization expense of other intangible assets      
2013 10,390,000    
2014 25,092,000    
2015 11,205,000    
2016 10,050,000    
2017 8,528,000    
2018 and after 7,471,000    
Goodwill impairment 3,000,000 0  
Core deposit intangible [Member]
      
Summary of other intangible assets      
Total other intangible assets, gross carrying amount 400,058,000   380,249,000
Total other intangible assets, accumulated amortization (358,492,000)   (335,552,000)
Total other intangible assets, net of carrying value 41,566,000   44,697,000
Customer relationship [Member]
      
Summary of other intangible assets      
Total other intangible assets, gross carrying amount 107,920,000   106,974,000
Total other intangible assets, accumulated amortization (64,310,000)   (58,675,000)
Total other intangible assets, net of carrying value 43,610,000   48,299,000
Other [Member]
      
Summary of other intangible assets      
Total other intangible assets, gross carrying amount 25,164,000   25,164,000
Total other intangible assets, accumulated amortization (25,016,000)   (24,967,000)
Total other intangible assets, net of carrying value 148,000   197,000
Retail & Business Banking [Member]
      
Goodwill by business segment      
Beginning Balance 286,824,000    
Goodwill acquired during the period 81,273,000    
Adjustments / Reallocation of goodwill 0    
Goodwill impairment 0    
Ending Balance 368,097,000    
Estimated amortization expense of other intangible assets      
Goodwill impairment 0    
Commercial Banking [Member]
      
Goodwill by business segment      
Beginning Balance 16,169,000    
Goodwill acquired during the period 0    
Adjustments / Reallocation of goodwill 43,425,000    
Goodwill impairment 0    
Ending Balance 59,594,000    
Estimated amortization expense of other intangible assets      
Goodwill impairment 0    
AFCRE [Member]
      
Goodwill by business segment      
Beginning Balance 0    
Goodwill acquired during the period 0    
Adjustments / Reallocation of goodwill 0    
Goodwill impairment 0    
Ending Balance 0    
Estimated amortization expense of other intangible assets      
Goodwill impairment 0    
RBPCG [Member]
      
Goodwill by business segment      
Beginning Balance 98,951,000    
Goodwill acquired during the period 0    
Adjustments / Reallocation of goodwill (8,939,000)    
Goodwill impairment 0    
Ending Balance 90,012,000    
Estimated amortization expense of other intangible assets      
Goodwill impairment 0    
Home Lending [Member]
      
Goodwill by business segment      
Beginning Balance 0    
Goodwill acquired during the period 0    
Adjustments / Reallocation of goodwill 3,000,000    
Goodwill impairment 3,000,000    
Ending Balance 0    
Estimated amortization expense of other intangible assets      
Goodwill impairment 3,000,000    
Treasury Other [Member]
      
Goodwill by business segment      
Beginning Balance 42,324,000    
Goodwill acquired during the period 0    
Adjustments / Reallocation of goodwill (37,486,000)    
Goodwill impairment 0    
Ending Balance 4,838,000    
Estimated amortization expense of other intangible assets      
Goodwill impairment $ 0