XML 67 R7.htm IDEA: XBRL DOCUMENT v2.4.1.9
Consolidated Statement of Equity (Parenthetical) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Preferred shares      
Offering costs $ 10,567us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember		 $ 13,904us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember		  
Common Stock | Class A common shares      
Offering costs $ 4,887us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 $ 85,984us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember		 $ 40,928us-gaap_PaymentsOfStockIssuanceCosts
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember