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EARNINGS PER COMMON SHARE (DETAILS) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Basic earnings per common share |  |
Net income | $ 160,952 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest | $ 148,471 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
Less: Amounts attributable to (from) noncontrolling interests | (4,873)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | 1,222 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Less: preferred share dividends | 10,022 us-gaap_PreferredStockDividendsIncomeStatementImpact | 10,022 us-gaap_PreferredStockDividendsIncomeStatementImpact
Net income available to common shareholders | 155,803 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | 137,227 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Weighted average common shares outstanding - basic | 99,910 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 109,053 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Basic earnings per common share | $ 1.56 us-gaap_EarningsPerShareBasic | $ 1.26 us-gaap_EarningsPerShareBasic
Diluted earnings per common share |  |
Net income available to common shareholders | $ 155,803 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 137,227 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic
Weighted average common shares outstanding - basic | 99,910 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 109,053 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Stock compensation plans | 1,229 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements | 1,338 us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Weighted average common shares outstanding - diluted | 101,139 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 110,391 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted earnings per common share | $ 1.54 us-gaap_EarningsPerShareDiluted | $ 1.24 us-gaap_EarningsPerShareDiluted
Anti-dilutive shares excluded from the dilutive computation | 569 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount | 1,051 us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 + Details
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