Shareholders' Equity (Details) (USD $)	1 Months Ended	3 Months Ended		10 Months Ended
	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Numerator:
Net income available to common shareholders		$ 13,113,000	$ 11,589,000
Denominator for basic earnings per share:
Weighted-average shares		78,115,779	71,295,673
Effect of dilutive securities:
Stock option dilution (in shares)		380,327	136,168
Denominator for diluted earnings per share:
Adjusted weighted-average shares and assumed conversions		78,496,106	71,431,841
EARNINGS PER COMMON SHARE INFORMATION:
Basic earnings per common share (in dollars per share)		$ 0.17	$ 0.16
Diluted earnings per common share (in dollars per share)		$ 0.17	$ 0.16
Antidilutive stock options awards excluded from earnings per common share calculation (in shares)		269,000	986,000
Percentage of shares of common stock authorized to be repurchased	5.00%
Shares of common stock repurchased				651,412
Aggregate cost of the repurchase, including commissions				$ 4,300,000