Allowance for Losses on Loans (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2013	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance			$ 116,741,000	$ 133,147,000	$ 133,147,000	$ 114,931,000
Charge-offs	(3,400,000)				(34,101,000)
Recoveries	5,619,000				16,345,000
Provisions & Transfers	(3,000,000)				1,350,000
Ending Allowance	114,150,000		114,150,000		116,741,000	114,931,000
Loans receivable, gross	8,447,709,000		8,447,709,000		7,990,545,000
Provision for (reversal of) loan losses	(3,000,000)	0	(11,936,000)	3,600,000
Nonaccrual loans by portfolio segment	94,226,000	131,299,000	94,226,000	131,299,000	131,299,000
Percentage increase (decrease) in nonperforming assets	28.20%		28.20%
Allowance for credit losses, charge-offs, net of recoveries		4,780,000	(2,219,000)
Single-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				81,815,000	81,815,000	63,348,000
Charge-offs	(2,530,000)				(20,947,000)
Recoveries	4,717,000				9,416,000
Provisions & Transfers	(3,175,000)				(6,100,000)
Ending Allowance	62,360,000		62,360,000		64,184,000	63,348,000
Loans receivable, gross	5,479,111,000		5,479,111,000		5,373,950,000
Nonaccrual loans by portfolio segment	78,317,000		78,317,000		100,460,000
Construction - Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				12,060,000	12,060,000	6,773,000
Charge-offs	0				(1,446,000)
Recoveries	2,000				501,000
Provisions & Transfers	(388,000)				(2,708,000)
Ending Allowance	6,387,000		6,387,000		8,407,000	6,773,000
Loans receivable, gross	126,926,000		126,926,000		130,778,000
Nonaccrual loans by portfolio segment	1,966,000		1,966,000		4,560,000
Construction - Custom [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				347,000	347,000	1,599,000
Charge-offs	0				(481,000)
Recoveries	0				0
Provisions & Transfers	79,000				1,016,000
Ending Allowance	1,678,000		1,678,000		882,000	1,599,000
Loans receivable, gross	372,789,000		372,789,000		302,722,000
Nonaccrual loans by portfolio segment	143,000		143,000		0
Land - Acquisition & Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				15,598,000	15,598,000	6,027,000
Charge-offs	0				(3,983,000)
Recoveries	85,000				4,105,000
Provisions & Transfers	843,000				(6,555,000)
Ending Allowance	6,955,000		6,955,000		9,165,000	6,027,000
Loans receivable, gross	91,058,000		91,058,000		81,660,000
Nonaccrual loans by portfolio segment	2,295,000		2,295,000		2,903,000
Land - Consumer Lot Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				4,937,000	4,937,000	2,974,000
Charge-offs	(86,000)				(1,363,000)
Recoveries	0				40,000
Provisions & Transfers	(26,000)				(62,000)
Ending Allowance	2,862,000		2,862,000		3,552,000	2,974,000
Loans receivable, gross	114,573,000		114,573,000		124,984,000
Nonaccrual loans by portfolio segment	1,879,000		1,879,000		3,337,000
Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				5,280,000	5,280,000	4,187,000
Charge-offs	0				(1,043,000)
Recoveries	0				171,000
Provisions & Transfers	(46,000)				(592,000)
Ending Allowance	4,141,000		4,141,000		3,816,000	4,187,000
Loans receivable, gross	896,799,000		896,799,000		835,598,000
Nonaccrual loans by portfolio segment	2,103,000		2,103,000		6,573,000
Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				1,956,000	1,956,000	5,924,000
Charge-offs	(32,000)				(747,000)
Recoveries	24,000				17,000
Provisions & Transfers	773,000				4,369,000
Ending Allowance	6,689,000		6,689,000		5,595,000	5,924,000
Loans receivable, gross	693,421,000		693,421,000		625,293,000
Nonaccrual loans by portfolio segment	5,442,000		5,442,000		11,736,000
Commercial & Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				7,626,000	7,626,000	20,403,000
Charge-offs	(38,000)				(1,145,000)
Recoveries	4,000				95,000
Provisions & Transfers	(1,673,000)				10,038,000
Ending Allowance	18,696,000		18,696,000		16,614,000	20,403,000
Loans receivable, gross	398,181,000		398,181,000		326,450,000
Nonaccrual loans by portfolio segment	516,000		516,000		477,000
HELOC [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				965,000	965,000	975,000
Charge-offs	(18,000)				(163,000)
Recoveries	0				0
Provisions & Transfers	58,000				200,000
Ending Allowance	1,015,000		1,015,000		1,002,000	975,000
Loans receivable, gross	136,304,000		136,304,000		133,631,000
Nonaccrual loans by portfolio segment	970,000		970,000		263,000
Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Beginning Allowance				2,563,000	2,563,000	2,721,000
Charge-offs	(696,000)				(2,783,000)
Recoveries	787,000				2,000,000
Provisions & Transfers	555,000				1,744,000
Ending Allowance	3,367,000		3,367,000		3,524,000	2,721,000
Loans receivable, gross	138,547,000		138,547,000		55,479,000
Nonaccrual loans by portfolio segment	595,000		595,000		990,000
Loans Collectively Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	114,090,000		114,090,000		113,268,000
Loans receivable, gross	8,072,245,000		8,072,245,000		7,495,504,000
Ratio	1.40%		1.40%		1.50%
Loans Collectively Evaluated for Impairment [Member] | Single-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	62,360,000		62,360,000		64,184,000
Loans receivable, gross	5,388,306,000		5,388,306,000		5,262,159,000
Ratio	1.20%		1.20%		1.20%
Loans Collectively Evaluated for Impairment [Member] | Construction - Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	6,327,000		6,327,000		7,307,000
Loans receivable, gross	116,420,000		116,420,000		115,554,000
Ratio	5.40%		5.40%		6.30%
Loans Collectively Evaluated for Impairment [Member] | Construction - Custom [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	1,678,000		1,678,000		882,000
Loans receivable, gross	372,789,000		372,789,000		302,722,000
Ratio	0.50%		0.50%		0.30%
Loans Collectively Evaluated for Impairment [Member] | Land - Acquisition & Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	6,955,000		6,955,000		6,943,000
Loans receivable, gross	86,030,000		86,030,000		67,521,000
Ratio	8.10%		8.10%		10.30%
Loans Collectively Evaluated for Impairment [Member] | Land - Consumer Lot Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	2,862,000		2,862,000		3,506,000
Loans receivable, gross	98,860,000		98,860,000		107,216,000
Ratio	2.90%		2.90%		3.30%
Loans Collectively Evaluated for Impairment [Member] | Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	4,141,000		4,141,000		3,711,000
Loans receivable, gross	888,346,000		888,346,000		824,279,000
Ratio	0.50%		0.50%		0.50%
Loans Collectively Evaluated for Impairment [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	6,689,000		6,689,000		5,595,000
Loans receivable, gross	495,988,000		495,988,000		400,789,000
Ratio	1.40%		1.40%		1.40%
Loans Collectively Evaluated for Impairment [Member] | Commercial & Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	18,696,000		18,696,000		16,614,000
Loans receivable, gross	377,271,000		377,271,000		256,954,000
Ratio	5.00%		5.00%		6.50%
Loans Collectively Evaluated for Impairment [Member] | HELOC [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	1,015,000		1,015,000		1,002,000
Loans receivable, gross	116,174,000		116,174,000		111,169,000
Ratio	0.90%		0.90%		0.90%
Loans Collectively Evaluated for Impairment [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	3,367,000		3,367,000		3,524,000
Loans receivable, gross	132,061,000		132,061,000		47,141,000
Ratio	2.60%		2.60%		7.50%
Loans Individually Evaluated for Impairment [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	60,000		60,000		3,473,000
Loans receivable, gross	138,620,000		138,620,000		159,564,000
Ratio	0.00%		0.00%		2.20%
Loans Individually Evaluated for Impairment [Member] | Single-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0		0		0
Loans receivable, gross	78,464,000		78,464,000		96,989,000
Ratio	0.00%		0.00%		0.00%
Loans Individually Evaluated for Impairment [Member] | Construction - Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	60,000		60,000		1,100,000
Loans receivable, gross	10,506,000		10,506,000		15,224,000
Ratio	0.60%		0.60%		7.20%
Loans Individually Evaluated for Impairment [Member] | Construction - Custom [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0		0		0
Loans receivable, gross	0		0		0
Ratio	0.00%		0.00%		0.00%
Loans Individually Evaluated for Impairment [Member] | Land - Acquisition & Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0		0		2,222,000
Loans receivable, gross	2,289,000		2,289,000		10,254,000
Ratio	0.00%		0.00%		21.70%
Loans Individually Evaluated for Impairment [Member] | Land - Consumer Lot Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0		0		46,000
Loans receivable, gross	13,059,000		13,059,000		14,455,000
Ratio	0.00%		0.00%		0.30%
Loans Individually Evaluated for Impairment [Member] | Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0		0		105,000
Loans receivable, gross	5,395,000		5,395,000		7,405,000
Ratio	0.00%		0.00%		1.40%
Loans Individually Evaluated for Impairment [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0		0		0
Loans receivable, gross	27,863,000		27,863,000		14,172,000
Ratio	0.00%		0.00%		0.00%
Loans Individually Evaluated for Impairment [Member] | Commercial & Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0		0		0
Loans receivable, gross	40,000		40,000		48,000
Ratio	0.00%		0.00%		0.00%
Loans Individually Evaluated for Impairment [Member] | HELOC [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0		0		0
Loans receivable, gross	1,004,000		1,004,000		1,017,000
Ratio	0.00%		0.00%		0.00%
Loans Individually Evaluated for Impairment [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Ending Allowance	0		0		0
Loans receivable, gross	0		0		0
Ratio	0.00%		0.00%		0.00%
Nonperforming Financing Receivable [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Loans receivable, gross	162,357,000	213,616,000	162,357,000	213,616,000
Grade as percentage of total gross loans	1.10%	1.60%	1.10%	1.60%
Nonaccrual loans by portfolio segment	94,226,000		94,226,000		131,299,000
Nonperforming Financing Receivable [Member] | Single-Family Residential [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	78,317,000		78,317,000		100,460,000
Nonperforming Financing Receivable [Member] | Construction - Speculative [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	1,966,000		1,966,000		4,560,000
Nonperforming Financing Receivable [Member] | Construction - Custom [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	143,000		143,000		0
Nonperforming Financing Receivable [Member] | Land - Acquisition & Development [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	2,295,000		2,295,000		2,903,000
Nonperforming Financing Receivable [Member] | Land - Consumer Lot Loans [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	1,879,000		1,879,000		3,337,000
Nonperforming Financing Receivable [Member] | Multi-Family [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	2,103,000		2,103,000		6,573,000
Nonperforming Financing Receivable [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	5,442,000		5,442,000		11,736,000
Nonperforming Financing Receivable [Member] | Commercial & Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	516,000		516,000		477,000
Nonperforming Financing Receivable [Member] | HELOC [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	970,000		970,000		263,000
Nonperforming Financing Receivable [Member] | Consumer [Member]
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Nonaccrual loans by portfolio segment	$ 595,000		$ 595,000		$ 990,000