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Condensed Consolidated Statement of Comprehensive Income (Unaudited) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Statement of Comprehensive Income [Abstract]        
Net income available to common stockholders $ 23,543 $ 17,299 $ 69,993 $ 55,118
Change in net unrealized gain (loss) on securities available-for-sale 0 39 678 116
Foreign currency translation adjustment 53 0 (307) 0
Comprehensive income $ 23,596 $ 17,338 $ 70,364 $ 55,234